Aqara U400 UWB Smart Deadbolt vs Aqara Smart Lock U300: Spec Comparison
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The aqara u400 uwb smart deadbolt vs smart lock u300 comparison focuses on how each lock handles access and connectivity. Both devices support Matter over Thread and Apple Home Key integration for seamless smart home control. The primary difference lies in their unlocking mechanisms and power sources. The U400 features UWB technology for hands-free entry and uses a rechargeable battery, while the U300 relies on traditional fingerprint and keypad methods with AA batteries. You should choose based on your preferred entry style and ecosystem needs.
Key differences
| Aspect | Aqara U400 UWB Smart Deadbolt | Aqara U300 Fingerprint Lock with Matter |
|---|---|---|
| Connectivity | Thread | Matter over Thread |
| Access Method | UWB, Apple Home Key, fingerprint, key | Fingerprint, keypad, NFC card, physical key |
| Power Source | Rechargeable lithium battery | 4 AA batteries |
| Smart Home Compatibility | Apple Home, Matter | Alexa, Google Assistant, IFTTT, Samsung SmartThings |
| Security Certification | BHMA-certified | Not listed |
Which one should you choose?
Choose Aqara U400 UWB Smart Deadbolt if
- You want hands-free unlocking using UWB technology with supported Apple devices.
- You prefer a rechargeable battery system that can be charged via USB-C without removing the lock.
- You need BHMA certification for proven mechanical strength and reliability.
Choose Aqara U300 Fingerprint Lock with Matter if
- You want compatibility with Google Home, Alexa, or Samsung SmartThings in addition to Apple Home.
- You prefer using standard AA batteries for potentially longer runtime without frequent recharging.
- You need a keypad for entering passcodes and one-time local passwords for guests.
Verdict: Choose the U400 if you value hands-free UWB access and a rechargeable power system within the Apple Home ecosystem. The U300 is better for users who need broader third-party smart home compatibility like Alexa or Google Assistant, along with traditional keypad entry options.
Power, Access, and Build Specs
Power source
The Aqara U400 UWB Smart Deadbolt uses a single rechargeable lithium battery that lasts up to six months per charge. You can recharge it via a USB-C port without taking the lock offline, or remove the battery for separate charging. The Aqara U300 Fingerprint Lock with Matter relies on four AA batteries, offering up to ten months of life. It also includes two USB-C ports for emergency backup power. The U300 provides longer battery longevity and easier replacement options for users who prefer standard batteries.
Access method
The Aqara U400 UWB Smart Deadbolt distinguishes itself with Ultra-Wideband (UWB) technology for true hands-free unlocking as you approach. It supports Apple Home Key, fingerprint, touchscreen passcode, voice assistant control, app remote access, NFC cards, and a physical key. The Aqara U300 Fingerprint Lock with Matter focuses on a fingerprint reader on the handle, one-time local passwords, periodic passwords, and NFC cards. It lacks the UWB proximity feature, making the U400 the superior choice for automated, touchless entry.
Smart home compatibility
Both locks utilize Matter over Thread for stable, low-power connectivity. The Aqara U400 UWB Smart Deadbolt is primarily optimized for Apple Home, requiring specific Apple devices like a Thread-enabled hub for UWB features. It integrates with the Aqara app for camera linkage. The Aqara U300 Fingerprint Lock with Matter offers broader third-party compatibility, explicitly supporting Google Home, Alexa, IFTTT, and Samsung SmartThings when paired with a Thread-enabled hub. If you use multiple smart home ecosystems, the U300 provides more versatile integration options.
Build and durability
The Aqara U400 UWB Smart Deadbolt features a BHMA-certified exterior with an IP65 rating, protecting it against dust and water for reliable outdoor performance. It also includes a rekeyable design to change the physical key without replacing the cylinder. The Aqara U300 Fingerprint Lock with Matter is built from robust zinc alloy and holds an IPX4 water resistance rating. It operates in temperatures ranging from -22°F to 131°F. The U400 offers a higher weather protection rating and mechanical certification for outdoor use.
Security features
Both locks prioritize data security with local storage and encryption. The Aqara U300 Fingerprint Lock with Matter stores all sensitive fingerprint data locally with full AES encryption. It also supports Passage Mode for high-traffic areas and Do Not Disturb Mode to mute sounds. The Aqara U400 UWB Smart Deadbolt includes Night Latch Mode, restricting night entry to admins and physical keys only. It also integrates with Aqara cameras for live video interaction during unlocking. The U400 provides more specialized security modes for different times of day.
Which Aqara Lock Fits Your Home
Apple users wanting keyless entry
The U400 supports UWB technology for hands-free unlocking as you approach. This feature works with iPhone 11 or later and Apple Watch Series 6 or later. You benefit from automatic detection of your direction and intent, making entry faster and more secure without touching the device.
Users preferring AA battery power
The U300 runs on four AA batteries, offering up to ten months of life. This eliminates the need for recharging or removing a lithium pack. You also get a zinc alloy build rated IPX4 for water resistance, ensuring reliable operation in various weather conditions without frequent maintenance.
Those needing mechanical key backup
The U400 includes a physical key and features a rekeyable design. You can change the physical key without replacing the entire lock cylinder. This provides a traditional backup option alongside digital access methods, ensuring you can always enter your home even if electronic systems fail or lose power.
Users wanting multiple access methods
The U300 supports up to 25 unique fingerprints and offers one-time local passwords. You can also use periodic passwords for guests when offline. This combination of high-capacity biometric storage and flexible password options provides versatile access control for households with many residents or frequent visitors.
The products compared
Aqara U400 UWB Smart Deadbolt
Best for: Apple ecosystem users wanting hands-free UWB access
- Access Methods
- Fingerprint, keypad, app, key, NFC, UWB
- Connectivity
- Matter over Thread, UWB
- Smart Home Compatibility
- HomeKit, Alexa, Google, Home Assistant
- Included Door Hardware
- Deadbolt
- Power Source
- Battery Powered
- Color
- Silver
View on Amazon: Aqara U400 UWB Smart Deadbolt Affiliate link
The Aqara U400 is a silver deadbolt featuring UWB technology for true hands-free unlocking as you approach. It supports Apple Home Key, fingerprint, passcode, and physical keys. The lock uses Matter over Thread for stable, low-power connectivity. It includes a rechargeable battery lasting up to six months and holds BHMA certification with an IP65 rating for outdoor durability. This model suits users seeking advanced proximity access within the Apple ecosystem.
Pros
- UWB technology enables automatic unlocking based on presence and direction
- Supports Apple Home Key, fingerprint, passcode, and physical keys
- Matter over Thread ensures fast and secure multi-ecosystem compatibility
- Rechargeable battery lasts up to 6 months with USB-C charging
- BHMA certified with IP65 weather resistance
Cons
- UWB hands-free unlocking requires specific Apple Watch and iPhone models
- NFC cards are sold separately
- Requires a Thread-enabled Matter controller for full smart home features
Good fit if
- You use an iPhone 11 or later with iOS 18.5+ and want hands-free entry
- You have an Apple Watch Series 6 or later for UWB access
- You need a BHMA-certified lock with IP65 weather protection
Skip if
- You do not own a compatible iPhone or Apple Watch for UWB
- You rely on Android or non-Thread smart home platforms without a Matter controller
- You prefer a lock that includes NFC cards in the box
Verdict: Aqara U400 UWB Smart Deadbolt delivers precise proximity unlocking for Apple users with compatible devices. It is the right fit for those prioritizing hands-free convenience and robust security standards.
Aqara U300 Fingerprint Lock with Matter
Best for: Apple Home Key and Matter integration
- Connectivity
- Matter over Thread, Bluetooth
- Installation Type
- Smart lever lock with handle
- Auto-Lock Delay
- Auto-Lock Mode available
- Fingerprint Capacity
- 25
- User Code Capacity
- Periodic and one-time passwords
- Included Door Hardware
- Smart lever lock with handle
View on Amazon: Aqara U300 Fingerprint Lock with Matter Affiliate link
The Aqara U300 is a black zinc alloy deadbolt with a built-in handle. It supports Matter over Thread, Apple Home Key, and local fingerprint storage. You can unlock it via fingerprint, NFC card, or passwords. The lock includes passage, auto-lock, and do not disturb modes. It runs on four AA batteries for up to 10 months and resists water with an IPX4 rating.
Pros
- Matter over Thread connectivity for broad smart home compatibility
- Apple Home Key support for iPhone and Apple Watch unlocking
- Local fingerprint storage with AES encryption for data security
- IPX4 water resistance and wide temperature tolerance
Cons
- NFC card is sold separately
- No mention of a built-in camera
- No mention of a keypad on the interior side
Good fit if
- You want to use Apple Home Key for keyless entry
- You need smart automations via Matter over Thread
- You prefer local data storage for fingerprint security
Skip if
- You require a built-in camera for video monitoring
- You need a keypad on the interior side
- You want an NFC card included in the box
Verdict: The Aqara U300 Smart Lock fits users who prioritize Apple Home Key integration and Matter over Thread compatibility. It offers secure local fingerprint storage and flexible unlocking options for modern smart homes.
Specifications side by side
| Spec | Aqara U400 UWB Smart Deadbolt | Aqara U300 Fingerprint Lock with Matter |
|---|---|---|
| Access Methods | Fingerprint, keypad, app, key, NFC, UWB | not stated |
| Connectivity | Matter over Thread, UWB | Matter over Thread, Bluetooth |
| Smart Home Compatibility | HomeKit, Alexa, Google, Home Assistant | not stated |
| Installation Type | not stated | Smart lever lock with handle |
| Auto-Lock Delay | not stated | Auto-Lock Mode available |
| Fingerprint Capacity | not stated | 25 |
| User Code Capacity | not stated | Periodic and one-time passwords |
| Included Door Hardware | Deadbolt | Smart lever lock with handle |
| Power Source | Battery Powered | not stated |
| Access Method | Fingerprint, Key | Keypad, Fingerprint, Touchscreen |
| Color | Silver | Black |
| Application | Home | Home |
| Included Hardware | not stated | Handle |
| Dimensions | 3 × 4.2 × 7 inches | 5.51 × 2.99 × 2.8 inches |
| Weight | not stated | 5.51 pounds |
| Model | DL-D16E | DL-D02D |
| Size | not stated | 5.51 x 2.99 x 2.80 |
Frequently asked questions
What is the main difference between the Aqara U400 and U300?
The U400 focuses on hands-free UWB access for Apple users, while the U300 emphasizes Matter integration and keypad entry. The U400 uses fingerprint and key access, whereas the U300 adds a touchscreen keypad. Both support Apple Home Key, but their primary unlocking methods differ to suit different user habits.
Does the Aqara U400 support Apple Home Key?
Yes, the Aqara U400 UWB Smart Deadbolt supports Apple Home Key. This allows compatible iPhone and Apple Watch users to unlock the door without removing their devices from pockets or bags. It complements the UWB hands-free feature for a seamless entry experience in an Apple-centric smart home.
Can I use a keypad to unlock the Aqara U400?
No, the Aqara U400 does not list a keypad or touchscreen as an access method. It relies on fingerprint scanning and physical keys. If you prefer entering a code, the U300 model includes a touchscreen keypad alongside fingerprint and touch access options for more versatile entry.
What are the dimensions of the Aqara U300 lock?
The Aqara U300 measures 5.51 inches in length, 2.99 inches in width, and 2.8 inches in height. It weighs 5.51 pounds. These dimensions help you determine if it fits your door thickness and backset requirements. The U400 has different dimensions, measuring 4.2 inches wide and 7 inches tall.
Is the Aqara U300 compatible with Alexa and Google?
Yes, the Aqara U300 Smart Lock is compatible with Alexa and Google Assistant. This allows you to control the lock through voice commands or routines in those ecosystems. The U400 data does not explicitly list third-party voice assistant compatibility, focusing instead on Apple ecosystem integration and UWB technology.
What color options are available for these Aqara locks?
The Aqara U400 UWB Smart Deadbolt is available in Silver. The Aqara U300 Fingerprint Lock comes in Black. These finish choices allow you to match the hardware to your existing door hardware or home decor style without needing to purchase additional covers or accessories for color matching.
Does the U400 require a separate handle for installation?
The product data for the U400 does not specify included hardware, but it is described as a deadbolt. The U300 explicitly includes a handle in its package. If you need a complete set with a lever or knob, the U300 provides that. You should verify if the U400 requires purchasing a separate handle separately.
Which lock is better for Matter over Thread users?
Both locks support Matter over Thread for smart home integration. However, the U300 is highlighted for its strong Matter and Apple Home Key focus. The U400 is optimized for UWB proximity unlocking. If your priority is broad Matter compatibility with voice assistants, the U300 offers more explicit third-party support in its specs.