Best Door Knobs with Knob: 15 Spec-Based Picks
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Upgrading to a dedicated door knob with knob simplifies access management for bedrooms, offices, and apartments without requiring extra deadbolt hardware. The Evanshow Biometric Fingerprint Door Knob earns the top spot by providing keypad, fingerprint, key, and key card access methods on a single lock unit.
We compared 15 products strictly using the specifications published on the listings. This guide helps you identify the right entry methods, physical dimensions, and locking features to secure your doors.
Quick picks
The best fit for you
- You need multiple credential methods for shared interior spaces Evanshow Biometric Fingerprint Door Knob This lock provides keypad, fingerprint, key, and key card access methods.
- You need a waterproof keypad knob with auto lock Iulock Keypad Keyless Entry Door Knob The unit features waterproof construction, auto lock functionality, and keypad with key entry.
- You want app control alongside keypad and fingerprint access GHome Smart Rechargeable Keypad Door Knob It supports app control, keypad, and fingerprint access methods alongside auto lock.
Our 15 picks
Evanshow Biometric Fingerprint Door Knob
Best for: multi-user bedrooms, offices, and rental spaces
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, code, key, IC card, app
- Fingerprint Capacity
- Up to 100
- Passcode Capacity
- 50
- App Compatibility
- Tuya
- Application
- Home, Office, Apartment, Bedroom, Hotel
This Evanshow biometric smart door knob replaces standard interior hardware to give you five unlock methods: fingerprint, keypad passcode, IC card, physical key, and the Tuya mobile app. It stores up to 100 fingerprints and 50 passwords, fitting left- or right-swing wooden doors between 1.18 and 1.97 inches thick. It suits you if you want versatile access control and app-based entry logs for an interior room, home office, or rental bedroom.
Pros
- Supports 5 unlock methods including fingerprint, passcode, IC card, app, and mechanical key
- Stores up to 100 fingerprints and 50 distinct passcodes
- Fits left- and right-swing wooden doors between 1.18 and 1.97 inches thick
- Includes an external USB port for emergency backup power
Cons
- Emergency USB port powers the lock but cannot recharge internal batteries
- Allows any fingerprint to unlock the mechanism until administrator setup is completed
Good fit if
- You need multiple access options including fingerprints, keypad codes, and IC cards.
- You have a wooden door with a thickness between 1.18 and 1.97 inches.
- You want to manage temporary guest access and track entry logs via a mobile app.
Skip if
- You have a door thinner than 1.18 inches or thicker than 1.97 inches.
- You need an integrated emergency port that recharges internal batteries directly.
Verdict: Evanshow Biometric Keypad Smart Door Knob provides comprehensive entry flexibility with high credential capacity for standard wooden interior doors. It delivers reliable access management through five unlock methods without requiring complex wiring.
KLLOQUE Rechargeable Fingerprint Door Knob
Best for: bedroom doors needing USB-C rechargeable access
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, app, mechanical key
- Auto-Lock Delay
- 5s
- Color
- Matte Black
- Dimensions
- 9 × 3.5 × 3.5 inches
- Weight
- 1.63 pounds
This smart door knob gives you biometric entry using an integrated fingerprint reader, Bluetooth app control, and physical keys. It features a built-in rechargeable battery powered by USB-C that lasts up to one year. You can select between normal auto-lock, passage, privacy, and silent modes via the thumb turn. It fits interior setups like bedroom doors or rental rooms where you want keyless privacy without replacing disposable alkaline batteries.
Pros
- Built-in rechargeable battery charges via USB Type-C
- Supports fingerprint, Bluetooth app, and mechanical key entry
- Four operation modes: normal 5-second auto-lock, passage, privacy, and silent
- App sends low-power alerts when the battery drops below 20 percent
Cons
- Not compatible with doors that have weather strips installed
- Remote management requires an external gateway sold separately
- No numeric keypad for PIN code entry
Good fit if
- You want a USB-C rechargeable knob instead of replacing standard batteries.
- You need distinct passage and privacy modes for interior doors.
- You prefer unlocking via fingerprint, local Bluetooth, or a backup mechanical key.
Skip if
- You have weather stripping installed on your door frame.
- You want PIN code access using a built-in keypad.
- You need remote Wi-Fi controls without purchasing an additional gateway.
Verdict: KLLOQUE Rechargeable Fingerprint Door Knob delivers convenient keyless access with multiple privacy modes and a rechargeable internal cell. It provides dependable local bedroom security without requiring ongoing battery replacements.
Iulock Keypad Keyless Entry Door Knob
Best for: keypad entry with IP65 weather resistance
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Keypad, key
- Passcode Capacity
- 50
- Water Resistance
- Waterproof
- Application
- Garage, Office, Bedroom
- Special Features
- Auto Lock
The Iulock Keypad Smart Door Knob gives you keyless access using a backlit numeric keypad or two standard physical keys. It stores up to 50 user codes ranging from 1 to 15 digits. The hardware fits doors between 1-3/8 and 2-1/2 inches thick with an adjustable latch. Built with IP65 weather resistance and auto-lock capability, it suits exterior or interior entryways where you want reliable PIN access without biometric sensors.
Pros
- Stores up to 50 customizable user codes from 1 to 15 digits
- IP65 weather rating with operating range of -22°F to 176°F
- Fits doors 1-3/8 to 2-1/2 inches thick with adjustable latch
- Includes passage mode, silent mode, and Type-C emergency power port
Cons
- Lacks biometric or fingerprint unlocking options
- No wireless app or Bluetooth connectivity listed
Good fit if
- You want keypad PIN and physical key entry rather than fingerprint scanning.
- You need a lock rated for exterior temperatures between -22°F and 176°F.
- You manage multiple users and need capacity for up to 50 access codes.
Skip if
- You prefer biometric fingerprint recognition for unlocking.
- You need smartphone control, Wi-Fi, or Bluetooth management.
Verdict: Iulock Keypad Smart Door Knob delivers practical PIN and physical key access with durable IP65 weatherproofing. It is a solid pick if you need dependable code entry across wide door thickness ranges without fingerprint hardware.
GHome Smart Rechargeable Keypad Door Knob
Best for: bedrooms and offices needing rechargeable keyless access
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, password, app, key
- Recognition Speed
- 0.2s
- Fingerprint Capacity
- 20
- Passcode Capacity
- 20
- Application
- Home, Garage, Office, Apartment, Bedroom
This GHome Smart biometric knob gives you four entry options: local fingerprint scanning, keypad codes, mechanical keys, and app control within Bluetooth range. It holds up to 20 fingerprints and 20 access codes, pairing with doors between 1-3/8 and 2-1/4 inches thick. Power comes from an integrated 400mAh rechargeable battery rather than disposable cells, making it a practical choice if you want keyless interior security.
Pros
- Built-in 400mAh rechargeable battery charges in 4 to 6 hours
- Four entry methods: fingerprint, keypad, physical key, and Bluetooth app
- Stores up to 20 fingerprints and 20 distinct passcodes locally
- Includes passage mode, silent mode, and 5-second automatic locking
Cons
- App controls operate strictly within local Bluetooth range
- Capacity is limited to 20 fingerprints and 20 passcodes
- Requires removing the knob or plugging it in for 4 to 6 hours to recharge
Good fit if
- You prefer an integrated rechargeable battery over swapping disposable batteries.
- You want local data storage without cloud transmission for your biometric profile.
- You need passage mode to keep the knob unlocked during regular use.
Skip if
- You need remote access management while outside local Bluetooth range.
- You manage a property requiring more than 20 unique user codes or fingerprints.
- You have door slabs thinner than 1-3/8 inches or thicker than 2-1/4 inches.
Verdict: GHome Smart Rechargeable Fingerprint Door Knob delivers flexible four-way access and local biometric security powered by an internal rechargeable battery. It is a capable upgrade for standard interior doors between 1-3/8 and 2-1/4 inches thick.
Evanshow Keypad and Biometric Door Knob
Best for: standalone keyless access on interior doors
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, password, key, IC card
- Recognition Speed
- 0.5s
- Fingerprint Capacity
- Up to 100
- Passcode Capacity
- 50
- Color
- Silver
This silver Evanshow biometric knob replaces standard hardware on wooden doors measuring 1.18 to 1.97 inches thick. You get keyless entry via a 0.5-second fingerprint scanner, numeric keypad, four IC cards, or two mechanical keys. It stores up to 100 fingerprints and 50 passcodes. An emergency USB port powers the unit if internal batteries fail. It suits you if you need multi-user bedroom or office access without app connectivity.
Pros
- Unlocks in 0.5 seconds using the fingerprint sensor
- Stores up to 100 fingerprints and 50 passwords
- Includes 4 IC cards and 2 mechanical keys
- Fits left- and right-swing wooden doors from 1.18 to 1.97 inches thick
Cons
- No mobile app connectivity listed
- Emergency USB port does not recharge internal batteries
- Unlocks with any fingerprint until an administrator is registered
Good fit if
- You need multiple access options including fingerprint, code, card, and key.
- You want to store up to 100 fingerprints and 50 passwords without an app.
- You have wooden doors measuring between 1.18 and 1.97 inches thick.
Skip if
- You require mobile app integration or remote locking.
- You have doors outside the 1.18 to 1.97-inch thickness range.
Verdict: Evanshow Biometric Keypad Door Knob provides standalone access through fingerprint, code, card, and physical keys. It installs on standard interior wooden doors without requiring network setup.
ThorBolt Keypad and Fingerprint Door Knob
Best for: interior doors needing hardware toggle passage modes
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, keypad, mechanical key
- Fingerprint Capacity
- 50
- Passcode Capacity
- 100
- Dimensions
- 6.5 × 2.68 × 2.68 inches
- Weight
- 1.48 pounds
This ThorBolt keyless interior door knob integrates a biometric sensor and an illuminated touch keypad. It stores up to 50 fingerprints and 100 passcodes, with two physical backup keys included. A physical toggle switch lets you quickly swap between standard operation, always-unlocked passage mode, and admin-only restriction. It fits doors 1-1/4 to 2-1/4 inches thick, making it practical if you want flexible room access without managing keys.
Pros
- Stores up to 50 fingerprints and 100 custom passcodes
- Hardware toggle switch supports passage, admin-only, and standard modes
- Backup entry includes two physical keys and an emergency Type-C port
- Adjustable latch fits 2-3/8 inch and 2-3/4 inch backsets
Cons
- Requires four AAA batteries that are not included in the box
- Lacks wireless app or remote connectivity in the specifications
Good fit if
- You want a physical toggle switch to enable passage or admin-only mode quickly.
- You need to store up to 50 fingerprints and 100 user passcodes.
- You have an interior door thickness between 1-1/4 and 2-1/4 inches.
Skip if
- You require mobile app management or remote Wi-Fi access.
- You want lock hardware that includes the necessary AAA batteries.
Verdict: ThorBolt Keypad and Fingerprint Door Knob delivers reliable biometric and PIN access alongside a dedicated 3-mode toggle switch for passage control. It is a solid interior hardware upgrade for offices and bedrooms requiring no app setup.
ThorBolt Fingerprint Keypad Door Knob
Best for: high-capacity multi-user interior door security
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, keypad, key
- Fingerprint Capacity
- 100
- Passcode Capacity
- 100
- Auto-Lock Delay
- 5 seconds
- Dimensions
- 2.95 × 2.95 × 7.48 inches
This ThorBolt biometric door knob combines fingerprint access, a digital keypad, and a physical keyway into a single zinc-alloy unit. It stores up to 100 fingerprints and 100 passcodes, locking automatically after five seconds of inactivity. It fits standard doors and includes Passage Mode, Silent Mode, and emergency Type-C USB powering. It suits you if you need multi-user keyless access for an interior office, rental room, bedroom, or residential utility space.
Pros
- Stores up to 100 unique fingerprints and 100 user passcodes
- Three entry options: biometric scanner, keypad, and backup physical key
- Bottom Type-C emergency power port for drained battery situations
- Automatic locking triggers after 5 seconds of inactivity
Cons
- Requires four AA alkaline batteries that are not included
- No wireless, Bluetooth, or mobile app integration listed in the specifications
Good fit if
- You need large capacity supporting up to 100 codes and 100 fingerprints.
- You want an automatic 5-second relocking function for interior security.
- You prefer having a bottom Type-C port for backup jump-starting.
Skip if
- You want a lock that includes the four required AA batteries in the box.
- You need smartphone app connectivity or remote Wi-Fi control.
Verdict: ThorBolt Fingerprint Keypad Door Knob delivers high-capacity biometric and passcode access with solid zinc alloy construction. It gives you flexible entry and automatic locking without requiring complex smartphone apps.
Buoan Biometric Fingerprint Door Knob
Best for: fast fingerprint access without number keypads
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, mechanical key
- Recognition Speed
- 0.3s
- Fingerprint Capacity
- 50
- Auto-Lock Delay
- 5s
- Color
- Black
The Buoan Fingerprint Door Knob gives you keyless entry via a 360-degree biometric scanner or a physical backup key. The scanner reads prints in 0.3 seconds and stores up to 50 users. It auto-locks after five seconds, though you can switch to passage mode or silent mode when needed. This hardware suits you if you want quick biometric access for interior rooms or entry doors without managing digital keypad codes.
Pros
- 0.3-second fingerprint recognition speed
- Stores up to 50 user fingerprints
- Includes mechanical backup keys
- Supports passage and silent modes
Cons
- Five-second automatic locking cannot be turned off
- No keypad code entry option
- No mobile app or wireless controls listed
Good fit if
- You want fast biometric unlocking without entering numeric PINs.
- You need to register up to 50 individual fingerprints.
- You want the door to lock automatically five seconds after closing.
Skip if
- You require a numeric keypad for guest codes.
- You need to permanently disable the auto-lock function.
Verdict: Buoan Fingerprint Door Knob delivers fast biometric access with 50-fingerprint capacity and automatic five-second relocking. It is a straightforward security choice if you prefer physical keys and fingerprint recognition over number pads.
AIMNAPS Fingerprint Smart Door Knob
Best for: fast biometric access on standard interior doors
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, code, key
- Recognition Speed
- 0.5s
- Application
- Office, Apartment, Bedroom
- Special Features
- Auto Lock
- Dimensions
- 1 × 1 × 1 inches
The AIMNAPS Fingerprint Smart Door Knob provides keyless entry for interior doors using biometric recognition and physical keys. It unlocks in under a second and engages an auto-lock mechanism whenever the door closes. Built to fit standard door thicknesses from 1.18 inches to 1.97 inches without wiring, this unit suits bedrooms, offices, and apartments where you want quick, automated access control and emergency USB power backup.
Pros
- Fingerprint sensor scans and recognizes prints in under 0.5 seconds
- Auto-lock function secures the door automatically upon closing
- Fits standard door thicknesses between 1.18 inches and 1.97 inches without drilling or wiring
- Emergency USB port enables backup power via power bank if batteries fail
Cons
- Unlocks with any fingerprint until an administrator fingerprint is registered
- USB port provides temporary power only and cannot recharge internal batteries
Good fit if
- You need an automatic locking knob for a bedroom, office, or apartment door.
- You have a standard door thickness between 1.18 inches and 1.97 inches.
- You want fast biometric entry supported by an emergency external power port.
Skip if
- You have doors thinner than 1.18 inches or thicker than 1.97 inches.
- You need a lock with rechargeable internal batteries via USB.
Verdict: AIMNAPS Fingerprint Smart Door Knob delivers rapid biometric entry and automatic locking for doors between 1.18 and 1.97 inches thick. Its emergency USB terminal ensures access even if primary batteries run out.
BIWIBON 5-in-1 Fingerprint Smart Door Knob
Best for: multi-user spaces needing local offline credential storage
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, passcode, app, IC card, key
- Fingerprint Capacity
- 100
- Passcode Capacity
- 100
- Dimensions
- 5.7 × 2.75 × 2.75 inches
- Weight
- 2.15 pounds
The BIWIBON 5-in-1 Biometric Smart Door Knob gives you five access methods: fingerprint, passcode, app control, IC cards, and mechanical keys. It stores up to 100 fingerprints, 100 passcodes, and 100 cards with all biometric data kept locally rather than in the cloud. It fits doors 1-1/8 to 2-1/8 inches thick with standard backsets. This lock suits you if you need flexible guest access, silent mode, and auto-locking.
Pros
- Five unlock methods: fingerprint, mobile app, code, IC card, and mechanical key
- Stores up to 100 fingerprints, 100 passcodes, and 100 IC cards
- Biometric and app data is stored locally off the cloud
- Features anti-peep passcode entry, passage mode, and adjustable auto-lock
Cons
- Requires using the mobile app to set timed or dynamic access codes
- Package includes only two physical keys and two IC cards
Good fit if
- You need high credential capacity for up to 100 users across multiple entry types.
- You prioritize local data privacy instead of cloud storage for biometric profiles.
- You want passage mode options for unrestricted door access during active hours.
Skip if
- You have a door with a thickness outside the 1-1/8 to 2-1/8 inch range.
- You require a lever-style handle rather than a standard circular knob.
Verdict: BIWIBON 5-in-1 Biometric Smart Door Knob provides high-capacity local access management across five entry formats. It delivers solid access flexibility for shared spaces without uploading user credentials to the cloud.
EUERTE Fingerprint Smart Door Knob
Best for: private interior rooms needing fingerprint access
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, app, physical key
- Recognition Speed
- 0.1s
- Fingerprint Capacity
- 100
- Auto-Lock Delay
- 5s
- App Compatibility
- TT LOCK
The EUERTE Biometric Smart Door Knob provides three entry methods: local fingerprint recognition, TT Lock app control, and physical keys. It stores up to 100 fingerprints locally without cloud uploads and locks automatically after five seconds. Made from zinc alloy with a weather-resistant finish, this unit suits your bedroom, home office, or rental interior doors when you need keyless entry combined with localized access log management.
Pros
- Stores up to 100 fingerprints locally without cloud sync
- Offers three unlock options: fingerprint, app, and physical key
- Includes 5-second auto-locking, passage mode, and privacy mode
- Zinc alloy build with sweat- and weather-resistant finish
Cons
- Lacks a numeric keypad for passcode entry
- Does not support RFID cards or key fobs
Good fit if
- You want local biometric storage without sending fingerprint data to the cloud.
- You need quick auto-locking for a home office, bedroom, or interior rental room.
- You prefer fingerprint and app access over punching in numeric codes.
Skip if
- You want a push-button or touchscreen keypad to share numerical access codes.
- You need RFID card or key fob access methods.
Verdict: EUERTE Biometric Smart Door Knob delivers practical keyless entry through local fingerprint recognition and smartphone control. It is a dependable choice if you want to bypass keypads in favor of direct biometric access.
Richelock Fingerprint Smart Door Knob
Best for: offline dynamic codes and extreme temperature durability
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, keypad, key
- Fingerprint Capacity
- 100
- Passcode Capacity
- 50
- Water Resistance
- Waterproof
- Color
- Matte Black
The Richelock Keypad Fingerprint Door Knob gives you keyless entry via a biometric sensor, backlit keypad, or physical key. It holds up to 100 fingerprints and 50 passcodes, fitting standard 2-3/8-inch or 2-3/4-inch backsets. Powered by two AAA batteries with USB-C emergency jump-starting, it operates in temperatures from -22°F to 176°F. This knob suits you if you need flexible access control for bedrooms, offices, or exterior doors without requiring an internet connection.
Pros
- Stores up to 100 fingerprints and 50 passcodes
- Operating temperature range spans -22°F to 176°F
- Generates dynamic passcodes without an app or Wi-Fi
- Includes USB-C emergency backup power port
Cons
- No mobile app or wireless connectivity included
- Uses AAA batteries instead of standard AA cells
Good fit if
- You want offline guest code generation without managing an app
- You need high fingerprint capacity for up to 100 profiles
- You need hardware rated for extreme exterior temperatures
Skip if
- You prefer unlocking and monitoring access via a smartphone app
- You want integration with third-party smart home platforms
Verdict: Richelock Keypad Fingerprint Door Knob provides standalone access control with voice-guided setup and offline dynamic codes. Its broad temperature tolerance and three entry methods make it a durable pick for interior and exterior doors.
RAFECIEE Fingerprint Smart Door Knob
Best for: private bedrooms, home offices, and interior doors
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, passcode, app, key
- Recognition Speed
- 0.1s
- Fingerprint Capacity
- 50
- Passcode Capacity
- 50
- Auto-Lock Delay
- 5 seconds
The RAFECIEE Fingerprint Smart Door Knob gives you keyless access using local biometric scanning, digital passcodes, or Bluetooth app management. It fits standard doors measuring 1-3/8 to 2 inches thick and stores up to 50 fingerprints and 50 passcodes. With a 5-second auto-lock and passage mode, this aluminum alloy knob works well if you want secure, local access control for an interior bedroom, office, or apartment without cloud storage.
Pros
- Four entry options: biometric scanner, keypad, Bluetooth app, and mechanical key
- Stores up to 50 fingerprints and 50 individual user passcodes
- Fingerprint data stays stored locally rather than uploading to cloud servers
- Built-in 5-second auto-lock, passage mode, and silent mode
Cons
- App control is limited to local Bluetooth range
- Requires four AAA batteries that are not included in the package
- Does not fit doors thicker than 2 inches
Good fit if
- You want keyless entry via fingerprint or code with a backup physical key.
- You prefer local biometric data storage rather than sending data to the cloud.
- You have a standard interior door with a thickness between 1-3/8 and 2 inches.
Skip if
- You require remote lock management when you are away from Bluetooth range.
- You need hardware to fit a door thicker than 2 inches.
Verdict: RAFECIEE Fingerprint Smart Door Knob delivers versatile offline security with its 50-fingerprint capacity, local data storage, and dependable auto-lock mechanism. It provides reliable interior access control without requiring a Wi-Fi connection.
Foxgard Biometric Smart Door Knob
Best for: interior doors needing versatile keyless entry options
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, code, app, IC card, key
- Color
- Black
- Dimensions
- 4.8 × 2 × 2 inches
- Weight
- 1.63 pounds
The Foxgard 5-in-1 Biometric Smart Door Knob gives you five entry methods: fingerprint recognition, a backlit keypad, IC cards, mobile app access, and physical keys. It features an aluminum alloy chassis measuring 4.8 inches long by 2 inches wide, plus a built-in electronic privacy deadlock. Powered by four AA batteries, this knob suits interior rooms, home offices, or rental units where you want scheduled guest codes and automated locking.
Pros
- Offers five unlock methods: fingerprint, keypad, app, IC card, and mechanical key
- Built-in electronic deadlock disables exterior entry for interior privacy
- App supports temporary, timed, and anti-peep passcodes with access logs
- Durable aluminum alloy construction fits standard door prep with no drilling
Cons
- Requires the Foxgard Gateway sold separately for Wi-Fi and voice control
- Requires four AA alkaline batteries that are not included
Good fit if
- You want multiple credential options including fingerprint, key fob, and keypad codes
- You manage an office or rental where you need to issue temporary guest access
- You need an internal electronic deadlock to secure rooms from inside
Skip if
- You want remote Wi-Fi access right out of the box without buying extra hardware
- You do not have four AA alkaline batteries available for setup
Verdict: Foxgard 5-in-1 Biometric Smart Door Knob delivers versatile keyless access with a durable aluminum body and multiple credential options. It serves interior rooms and offices reliably, though remote features require purchasing a separate gateway.
Buoan 5-in-1 Smart Fingerprint Door Lock
Best for: households needing multiple entry methods and durable build
- Included Hardware
- Knob (what this guide is about)
- Access Methods
- Fingerprint, app, password, card, key
- Recognition Speed
- 0.3 seconds
- Fingerprint Capacity
- Up to 100
- Dimensions
- 6.34 × 2.6 × 2.6 inches
- Weight
- 1.76 pounds
This Buoan smart door knob supports five access methods: fingerprint, app, password, card, and key. It stores up to 100 fingerprints with 0.3-second recognition. The zinc alloy build includes a touch backlit keypad and auto-lock. It connects via Bluetooth for real-time notifications. The unit weighs 1.76 pounds and fits standard US doors.
Pros
- Supports five access methods including fingerprint and app
- Stores up to 100 fingerprints with 0.3-second recognition
- Zinc alloy construction for durability
- Bluetooth connectivity for real-time unlock notifications
Cons
- Auto-lock function cannot be turned off
- Requires four 1.5V alkaline batteries
- No Wi-Fi direct connectivity mentioned
Good fit if
- You want multiple access options like cards and keys
- You need quick 0.3-second fingerprint recognition
- You prefer a zinc alloy build over plastic
Skip if
- You need to disable the auto-lock feature
- You want Wi-Fi direct control without a hub
- You prefer rechargeable battery options
Verdict: Buoan 5-in-1 Smart Fingerprint Door Knob offers versatile access and fast recognition for households needing multiple entry methods. It suits users who value durable zinc alloy construction and Bluetooth monitoring.
Specifications side by side
| Spec | Evanshow Biometric Fingerprint Door Knob | KLLOQUE Rechargeable Fingerprint Door Knob | Iulock Keypad Keyless Entry Door Knob | GHome Smart Rechargeable Keypad Door Knob | Evanshow Keypad and Biometric Door Knob | ThorBolt Keypad and Fingerprint Door Knob | ThorBolt Fingerprint Keypad Door Knob | Buoan Biometric Fingerprint Door Knob | AIMNAPS Fingerprint Smart Door Knob | BIWIBON 5-in-1 Fingerprint Smart Door Knob | EUERTE Fingerprint Smart Door Knob | Richelock Fingerprint Smart Door Knob | RAFECIEE Fingerprint Smart Door Knob | Foxgard Biometric Smart Door Knob | Buoan 5-in-1 Smart Fingerprint Door Lock |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Access Methods | Fingerprint, code, key, IC card, app | Fingerprint, app, mechanical key | Keypad, key | Fingerprint, password, app, key | Fingerprint, password, key, IC card | Fingerprint, keypad, mechanical key | Fingerprint, keypad, key | Fingerprint, mechanical key | Fingerprint, code, key | Fingerprint, passcode, app, IC card, key | Fingerprint, app, physical key | Fingerprint, keypad, key | Fingerprint, passcode, app, key | Fingerprint, code, app, IC card, key | Fingerprint, app, password, card, key |
| Recognition Speed | not specified | not specified | not specified | 0.2s | 0.5s | not specified | not specified | 0.3s | 0.5s | not specified | 0.1s | not specified | 0.1s | not specified | 0.3 seconds |
| Fingerprint Capacity | Up to 100 | not specified | not specified | 20 | Up to 100 | 50 | 100 | 50 | not specified | 100 | 100 | 100 | 50 | not specified | Up to 100 |
| Passcode Capacity | 50 | not specified | 50 | 20 | 50 | 100 | 100 | not specified | not specified | 100 | not specified | 50 | 50 | not specified | not specified |
| Auto-Lock Delay | not specified | 5s | not specified | not specified | not specified | not specified | 5 seconds | 5s | not specified | not specified | 5s | not specified | 5 seconds | not specified | not specified |
| App Compatibility | Tuya | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | TT LOCK | not specified | not specified | not specified | not specified |
| Access Method | Keypad, Fingerprint, Key, Key Card | Fingerprint | Keypad, Key | Keypad, Fingerprint, App Control | Keypad, Fingerprint | Keypad, Fingerprint | Keypad, Fingerprint | Fingerprint | Fingerprint, Key | Fingerprint | Fingerprint, App Control | Keypad, Fingerprint | Fingerprint, App Control | Fingerprint | Fingerprint |
| Water Resistance | not specified | not specified | Waterproof | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | Waterproof | not specified | not specified | not specified |
| Color | BLACK 03 | Matte Black | Stain Nickel | Glossy Black | Silver | Desert Titanium | Ablack | Black | black 02 | Silver 02 | Black | Matte Black | Matte Black | Black | YL-52-Black |
| Application | Home, Office, Apartment, Bedroom, Hotel | not specified | Garage, Office, Bedroom | Home, Garage, Office, Apartment, Bedroom | Home, Office, Apartment, Bedroom, Hotel | not specified | not specified | not specified | Office, Apartment, Bedroom | not specified | Office, Apartment, Bedroom, Hotel | Office, Bedroom | Office, Apartment, Bedroom | not specified | not specified |
| Included Hardware | Knob | Knob | Knob | Knob | Knob | Knob | Knob | Knob | Knob | Knob | Knob | Knob | Knob | Knob | Knob |
| Special Features | not specified | not specified | Auto Lock | Auto Lock | not specified | not specified | not specified | not specified | Auto Lock | not specified | not specified | Auto Lock | Auto Lock | not specified | not specified |
| Dimensions | 5.5 × 5.5 × 5.5 inches | 9 × 3.5 × 3.5 inches | 7 × 4.5 × 3.1 inches | 3.93 × 9.05 × 9.05 inches | 1 × 2 × 2 inches | 6.5 × 2.68 × 2.68 inches | 2.95 × 2.95 × 7.48 inches | 7.4 × 2.95 × 2.95 inches | 1 × 1 × 1 inches | 5.7 × 2.75 × 2.75 inches | 9.29 × 3.29 × 3.29 inches | 7 × 3 × 3 inches | 8.74 × 6.5 × 3.74 inches | 4.8 × 2 × 2 inches | 6.34 × 2.6 × 2.6 inches |
| Weight | 1.2 pounds | 1.63 pounds | 1.88 pounds | 1.68 pounds | 1.2 pounds | 1.48 pounds | 2.01 pounds | not specified | not specified | 2.15 pounds | 1.72 pounds | not specified | 1.65 pounds | 1.63 pounds | 1.76 pounds |
| Size | door lock | 1 Piece | not specified | not specified | None APP | not specified | Fingerprint | not specified | smart door lock | 1 Pack | 9.29"L x 3.29"W | not specified | 1 Piece | not specified | not specified |
| Model | 003 | K10B | IU-30 | K10PRO Smart Door Knob | 190NOSilver | G1 | MD1 | YL-98JA-Black | Fingerprint Door Lock | BCA-02 | S10T | IU51B | G99 plus | FNL-01 | YL-52-Black |
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How to Choose the Right Door Knob
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Check Power Source and Charging
Check how each door knob receives power before choosing a model for your door. Some locks use replaceable standard cells, while others include a built-in rechargeable battery that connects to a USB-C cable. If you dislike swapping disposable batteries, look for integrated rechargeable designs such as the KLLOQUE Rechargeable Fingerprint Door Knob. Also verify whether the exterior knob includes an emergency USB port. An emergency terminal lets you connect an external power bank to unlock the latch if the internal battery drains completely.
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Verify Door Thickness Compatibility
Measure the thickness of your door slab before buying any replacement knob. Smart knobs specify exact door depth ranges that their interior spindle and mounting screws can span. For example, the AIMNAPS Fingerprint Smart Door Knob accommodates doors measuring between 1.18 and 1.97 inches thick. If your interior or exterior door falls outside a product's stated range, the latch spindle might not engage properly or the exterior escutcheon will fit loosely. Always match your door slab measurement directly to the manufacturer thickness range.
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Confirm Water Resistance Ratings
Evaluate where you plan to install the knob before selecting hardware. Interior doors in bedrooms or home offices do not need weatherproofing, but exterior entries, garages, and covered porches require protection from moisture and dust. If you install a knob on an entry exposed to rain, confirm that the product specifications explicitly state waterproof construction. The Iulock Keypad Keyless Entry Door Knob lists waterproof protection, making it suitable for garage entries. Choosing an unrated interior model for damp or exterior settings risks moisture damage to electronic boards.
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Check Automatic Relocking Behavior
Check how the latch secures itself after someone opens the door. Many smart knobs provide an auto-lock function that re-engages the locking mechanism after a set delay. The Buoan Biometric Fingerprint Door Knob relocks automatically five seconds after unlocking, ensuring the room remains secured without manual intervention. If you use your door for high-traffic rooms where you walk in and out frequently, check if the lock supports passage mode or toggles off auto lock. This setting keeps the door free to turn during active working hours.
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Consider Dual-Sided Keypad Needs
Determine whether you require access restrictions from both sides of the door. Most smart knobs place keypad or biometric hardware on the exterior while using a standard manual thumb-turn or free-exit handle on the interior side. However, outdoor gates, courtyard entries, or sensitive interior partitions may require credential checks to exit as well as enter. The TALVTEC Dual-Sided Keypad Door Knob provides keypad and physical key access on both exterior and interior handles. This configuration prevents unauthorized persons from reaching around an open gate frame to unlock the door.
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Review Physical Dimensions and Clearance
Check the physical dimensions and weight of the knob assembly against your door frame and backset spacing. Electronic door knobs vary noticeably in bulk, ranging from compact 2-inch rosettes to longer assemblies over 9 inches in length. Units like the BIWIBON 5-in-1 Fingerprint Smart Door Knob weigh 2.15 pounds with a 5.7-inch total length. If your door has narrow stiles, decorative molding, or an adjacent screen door, measuring lock clearance prevents the knob body from striking door jambs or interfering with secondary screen door latches during closing.
Frequently asked questions
Which door knobs with knob hardware include physical backup keys?
Several models provide physical keys alongside digital entry methods. The Evanshow Biometric Fingerprint Door Knob pairs traditional keys with keypad, fingerprint, and key card entry. For non-biometric setups, the Iulock IU-30 and TALVTEC IU62 combine physical metal keys with keypad hardware. The AIMNAPS smart knob also retains physical key access alongside its fingerprint reader, giving you a manual backup if electronic components fail.
Are door knobs with knobs suitable for outdoor gate installations?
Yes, specific models are built for gates and exterior boundaries. The TALVTEC Dual-Sided Keypad Door Knob provides dual-sided keypad and key access specifically suited for gate installations and specialized perimeter entry. In addition, locks such as the Iulock IU-30 and Richelock IU51B feature waterproof ratings, allowing them to withstand moisture and weather exposure across outside locations where basic interior-only knobs cannot operate safely.
How does auto-lock functionality work on a smart door knob?
Auto-lock automatically secures the latch bolt a set time after the door closes. Hardware like the Buoan Biometric Fingerprint Door Knob uses automatic five-second relocking to prevent accidental entry. Models including the Iulock IU-30, GHome Smart K10PRO, and RAFECIEE G99 plus list auto-lock as a built-in feature, ensuring the knob stays locked behind you without requiring manual code entry or thumbturn engagement.
What door thickness is supported by standard smart door knobs?
Supported door thickness depends on the specific hardware latch and spindle design. For example, the AIMNAPS Fingerprint Smart Door Knob fits door thicknesses ranging between 1.18 and 1.97 inches. The GHome Smart K10PRO supports doors measuring between 1-3/8 inches and 2-1/4 inches thick. You should always measure your door slab before installation to ensure the knob spindle and mounting screws fit properly.
Can you install a smart door knob without smartphone app connectivity?
Yes, many smart door knobs operate entirely offline without network setup or smartphone applications. The Evanshow 190NOSilver model provides standalone keypad and fingerprint recognition with zero app compatibility. Similarly, both ThorBolt MD1 and ThorBolt G1 manage credentials on the physical lock body itself. Choosing non-connected hardware prevents account configuration steps, eliminates potential pairing errors, and keeps all access programming strictly on the local hardware.
What finish and color options are available for door knobs?
Manufacturers offer several metallic and coated finishes to match interior decor. Matte Black and standard black finishes appear on models from KLLOQUE, EUERTE, and RAFECIEE. If you prefer metallic tones, the Iulock IU-30 and TALVTEC IU62 feature Satin Nickel, while Evanshow and BIWIBON offer Silver. Distinctive finishes also exist, such as Glossy Black on the GHome Smart K10PRO and Desert Titanium on the ThorBolt G1.
Which door knobs work best if you do not want a number keypad?
If you prefer clean hardware without a numeric keypad, select dedicated biometric-only knobs. The Buoan Biometric Fingerprint Door Knob eliminates number pads entirely, relying strictly on fingerprint authentication and physical keys. Other options like the KLLOQUE K10B, Foxgard FNL-01, and BIWIBON BCA-02 focus exclusively on fingerprint entry, providing a streamlined aesthetic on interior doors while maintaining keyless operation for daily room access.