Aqara U400 UWB Smart Deadbolt vs Aqara Smart Lock Handle U300 (2026): Key Differences
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The aqara u400 uwb smart deadbolt vs smart lock handle u300 comparison highlights two distinct entry points for smart home security. Both models support Apple Home Key and Matter over Thread for broad compatibility. The primary difference lies in their physical design and power systems. The U400 is a traditional deadbolt with UWB hands-free access and a rechargeable battery. The U300 is a lever-style handle powered by AA batteries, featuring a higher-resolution fingerprint sensor. You must choose based on your door hardware and preferred unlocking convenience.
Key differences
| Aspect | Aqara U400 UWB Smart Deadbolt | Aqara U300 Smart Lever Lock |
|---|---|---|
| Power Source | Rechargeable lithium battery | 4 AA alkaline batteries |
| Access Methods | UWB, Apple Home Key, fingerprint, NFC, key | Apple Home Key, fingerprint, key |
| Fingerprint Sensor Resolution | Not listed | 160×160 pixel array |
| App Connectivity | Thread and Aqara App integration | Bluetooth for Aqara App controls |
| Battery Life | Up to 6 months per charge | Up to 10 months on AA batteries |
| Physical Design | Deadbolt mechanism | Smart lever handle |
Which one should you choose?
Choose Aqara U400 UWB Smart Deadbolt if
- You want true hands-free unlocking as you approach your door using UWB technology.
- You prefer a rechargeable battery that can be swapped or charged via USB-C without taking the lock offline.
- You need a traditional deadbolt design rather than a lever handle.
Choose Aqara U300 Smart Lever Lock if
- You want a larger fingerprint sensor for faster recognition and higher accuracy.
- You prefer the convenience of standard AA batteries that last up to 10 months.
- You need a lever-style handle that operates the latch mechanically.
Verdict: Choose the U400 if you prioritize hands-free UWB entry and a rechargeable power system. The U300 is better if you value a larger fingerprint sensor and the simplicity of AA batteries. Both locks offer robust Matter over Thread connectivity for smart home integration.
U400 UWB vs U300 Handle Specs
Power source
The U400 uses a rechargeable, removable lithium battery that lasts up to six months per charge. You can recharge it via the USB-C port without taking the lock offline, or remove the battery to charge it separately. A low-battery voice alert warns you when power drops below 20 percent. The U300 runs on four AA alkaline batteries for up to ten months of operation. It requires alkaline cells to avoid instability and includes dual USB-C ports for emergency backup power. The U400 offers convenient top-up charging, while the U300 provides longer standalone battery life with standard replacements.
Access method
The U400 supports UWB (Ultra-Wideband) for true hands-free unlocking as you approach, requiring a Thread-enabled Apple Home hub and compatible iOS or watchOS devices. It also accepts Apple Home Key, fingerprints, passcodes, NFC cards, voice commands, and a physical key. The U300 focuses on Apple Home Key tap-to-unlock, Siri hands-free access, fingerprints, and a physical key. It lacks UWB and NFC card support in the provided data. The U400 provides more entry options, including the convenient automatic UWB feature, whereas the U300 relies on traditional tap and biometric methods.
Fingerprint resolution
The U300 features a high-resolution fingerprint sensor with a 160x160 pixel array, which is double the size of common 128x96 sensors. This allows for richer detail capture, achieving recognition in under 0.3 seconds with a false acceptance rate below 0.0001 percent. It supports up to 25 stored fingerprints. The U400 includes a fingerprint sensor but does not specify resolution or speed metrics in the provided data. The U300 offers superior technical specifications for biometric accuracy and speed, ensuring faster and more reliable daily use for families with multiple users.
Smart home compatibility
Both locks utilize Matter over Thread for multi-ecosystem compatibility, connecting to multiple smart home platforms simultaneously. Thread ensures faster response times, stable connectivity, lower power consumption, and secure data transmission. Both require a Thread-enabled Matter controller from each ecosystem for full functionality. The U400 integrates with Aqara cameras like the G5 Pro and G410 doorbell for live video interaction and unlocking. The U300 connects to the Aqara App over Bluetooth for in-app controls, including auto-lock timing and scheduled quiet mode. Both offer robust Thread-based connectivity, though the U400 adds specific camera integration features.
Build and durability
The U400 is BHMA-certified for proven protection, mechanical strength, and long-term reliability. Its exterior carries an IP65 rating, guarding against dust and water for dependable outdoor performance. It also features a rekeyable design, allowing you to change the physical key without replacing the entire lock cylinder. The U300 data does not list BHMA certification, IP rating, or rekeyable features. The U400 provides clearer evidence of outdoor durability and mechanical security standards, making it a stronger choice for harsh weather conditions and long-term physical reliability.
Data security
The U300 stores all sensitive data, including fingerprints, locally with full AES encryption for enhanced security and peace of mind. The U400 data does not explicitly specify the encryption standard or local storage method for biometric data in the provided information. While both likely prioritize security, the U300 explicitly highlights its local AES encryption protocol. This transparency regarding data protection gives the U300 a slight advantage in terms of documented security measures for user biometric information.
Which Aqara Smart Lock Fits You
Apple ecosystem users wanting hands-free entry
The U400 features Ultra-Wideband technology for true hands-free unlocking. It detects your presence and intent as you approach, opening automatically without touching the device. This works with compatible iPhones and Apple Watches, offering a seamless experience when your hands are full or you are wearing gloves.
Users prioritizing battery life and local storage
The U300 runs on four AA alkaline batteries for up to ten months of operation. It stores fingerprint data locally with AES encryption. You can connect to the Aqara app via Bluetooth to customize settings. This model avoids rechargeable battery maintenance while keeping your biometric data secure on the device.
Buyers needing higher security certifications and durability
The U400 is BHMA-certified for mechanical strength and long-term reliability. It holds an IP65 rating to resist dust and water for outdoor use. The design includes a rekeyable cylinder, allowing you to change the physical key without replacing the entire lock mechanism, ensuring sustained security over time.
Those wanting fast fingerprint recognition accuracy
The U300 uses a high-resolution 160x160 pixel fingerprint sensor. This captures richer details than standard sensors, achieving recognition in under 0.3 seconds. It supports up to 25 stored fingerprints with a false acceptance rate below 0.0001%, providing reliable and instant access for multiple household members.
The products compared
Aqara U400 UWB Smart Deadbolt
Best for: hands-free UWB entry and Apple Home Key users
- 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 Ultra-Wideband (UWB) technology for hands-free unlocking. It supports Apple Home Key, fingerprint, passcode, and physical keys. The lock uses Matter over Thread for stable connectivity and includes a rechargeable lithium battery lasting up to six months. It is BHMA-certified and IP65-rated for outdoor durability. This model suits users seeking advanced proximity access and multi-ecosystem compatibility.
Pros
- UWB technology enables true hands-free unlocking as you approach
- Supports Apple Home Key, fingerprint, passcode, and physical keys
- Matter over Thread ensures fast and secure connectivity
- Rechargeable battery lasts up to six months per charge
- BHMA-certified with IP65-rated exterior for outdoor use
Cons
- UWB unlocking requires specific iPhone and Apple Watch models
- NFC card support requires a separately sold card
- Thread-enabled Matter controller is required for full functionality
Good fit if
- You want hands-free entry using UWB technology
- You use Apple Home Key and Matter-enabled hubs
- You need a rechargeable battery with USB-C charging
Skip if
- You do not have a compatible iPhone or Apple Watch
- You prefer a traditional mechanical lock without smart features
- You need NFC card support without purchasing extra cards
Verdict: The Aqara U400 UWB Smart Deadbolt fits users who want hands-free entry via UWB and Apple Home Key. It is ideal for those with compatible Apple devices and Matter hubs who value rechargeable convenience and outdoor durability.
Aqara U300 Smart Lever Lock
Best for: Apple Home Key users seeking fast fingerprint access
- Access Methods
- Apple Home Key, fingerprint, keypad
- Connectivity
- Matter over Thread, Bluetooth
- Smart Home Compatibility
- HomeKit, Alexa, Google
- Fingerprint Capacity
- 25 fingerprints
- Included Door Hardware
- Lever handle
- Color
- Silver
View on Amazon: Aqara U300 Smart Lever Lock Affiliate link
The Aqara U300 is a silver smart lever lock with a 160x160 pixel fingerprint sensor. It unlocks in under 0.3 seconds with a false acceptance rate below 0.0001%. You can store up to 25 fingerprints. It supports Apple Home Key and Matter over Thread for multi-ecosystem use. The lock runs on four AA alkaline batteries for up to 10 months. It includes dual USB-C ports for emergency backup power.
Pros
- 160x160 pixel high-resolution fingerprint sensor
- Supports Apple Home Key and Matter over Thread
- Stores up to 25 fingerprints
- Runs up to 10 months on four AA alkaline batteries
Cons
- Requires a Thread-enabled Apple hub for full Apple Home Key functionality
- Alkaline batteries are required to avoid malfunction
- Connects to the Aqara App only via Bluetooth
Good fit if
- You use Apple devices and want seamless Home Key integration
- You need fast fingerprint recognition with high accuracy
- You want a lock that supports Matter over Thread
Skip if
- You do not have a Thread-enabled hub for Apple Home Key
- You prefer lithium batteries over alkaline
- You need Wi-Fi direct app control without a hub
Verdict: Aqara U300 Smart Lever Lock is a strong fit for Apple users who value speed and local fingerprint storage. It suits those who already have the necessary Thread hub for full ecosystem integration.
Specifications side by side
| Spec | Aqara U400 UWB Smart Deadbolt | Aqara U300 Smart Lever Lock |
|---|---|---|
| Access Methods | Fingerprint, keypad, app, key, NFC, UWB | Apple Home Key, fingerprint, keypad |
| Connectivity | Matter over Thread, UWB | Matter over Thread, Bluetooth |
| Smart Home Compatibility | HomeKit, Alexa, Google, Home Assistant | HomeKit, Alexa, Google |
| Fingerprint Capacity | not stated | 25 fingerprints |
| Included Door Hardware | Deadbolt | Lever handle |
| Power Source | Battery Powered | not stated |
| Access Method | Fingerprint, Key | Keypad, Fingerprint, Touchscreen, Key |
| Color | Silver | Silver |
| Application | Home | Home |
| Included Hardware | not stated | Handle |
| Dimensions | 3 × 4.2 × 7 inches | 5.51 × 2.99 × 2.8 inches |
| Model | DL-D16E | DL-D02D |
Frequently asked questions
Does the Aqara U400 UWB Smart Deadbolt support Apple Home Key?
Yes, the U400 supports Apple Home Key for seamless integration. This feature allows you to unlock the door using compatible Apple devices without needing a separate key. The lock is designed to work with Matter over Thread, ensuring broad compatibility with your existing smart home ecosystem and Apple hardware.
What access methods does the Aqara U400 use?
The U400 supports fingerprint and physical key access. You can unlock the door by placing your finger on the sensor or by using a traditional key. This combination provides reliable entry options even if your phone battery dies or the fingerprint sensor encounters issues during use.
Is the Aqara U300 compatible with Apple Home Key?
Yes, the U300 Smart Lever Lock is compatible with Apple Home Key. This allows users with compatible Apple devices to unlock the door easily. It is a strong fit for those who value speed and local fingerprint storage alongside their existing Apple ecosystem integration for home security.
What is the main difference in design between the U400 and U300?
The U400 is a full smart deadbolt with a distinct physical form factor. The U300 is a smart lever lock that includes a handle. The U400 measures 4.2 inches in width and 7 inches in height, while the U300 is more compact at 2.99 inches wide and 2.8 inches high.
Does the U300 include a handle?
Yes, the Aqara U300 Smart Lever Lock includes a handle. This hardware is part of the package, making it a complete solution for doors that require a lever-style mechanism. The U400, by contrast, is a deadbolt and does not include a separate handle component in its design.
What is the model number for the Aqara U400 UWB?
The model number for the Aqara U400 UWB Smart Deadbolt is DL-D16E. This identifier helps you verify the specific product when checking specifications or compatibility. It is distinct from the U300, which carries the model number DL-D02D, ensuring you select the correct device for your needs.
Can the U400 be used for home applications?
Yes, the U400 is designed for home applications. It is built to provide secure entry for residential doors. The lock features a silver color finish that blends with standard home decor. Its durable construction supports outdoor durability, making it suitable for exterior door installations in various home environments.
What color options are available for these Aqara locks?
Both the U400 UWB Smart Deadbolt and the U300 Smart Lever Lock are available in silver. This consistent color option allows you to match the locks with existing door hardware or finishes. The silver finish provides a modern look that complements most residential entryways without requiring additional painting or customization.