Aqara UWB Smart Lock U400, Matter Over Thread, Apple Home Key, Fingerprint Keyless Entry Deadbolt,Touchscreen Keypad, Rechargeable Battery, Supports HomeKit, Alexa, Google, Home Assistant, Black
About this item True Hands-Free Unlocking with UWB Technology: Experience a new era of smart access — UWB (Ultra-Wideband) detects your incoming presence, direction, and intent to unlock automatically as you approach. It provides a faster, more convenient, and highly secure way to enter your home without touching the lock. Perfect when your hands are full, you're wearing gloves, or arriving in the rain. (Note: UWB unlocking requires a Thread-enabled Apple Home hub and is supported on Apple Watch Series 6 or later (excluding SE) running watchOS 11.5+ and iPhone 11 or later (excluding iPhone SE & iPhone 16e) running iOS 18.5+.) All-in-One Unlocking Options: Enjoy Apple home key tap-to-unlock (requires an Apple Thread-enabled Matter controller: HomePod 2nd Gen, HomePod mini, or Apple TV 4K 2021/2022), plus fingerprint, touchscreen passcode, voice assistant control, app remote access, NFC card support (card sold separately), and a physical key, giving you flexible, reliable ways to enter your home in any situation. Matter Over Thread for Multi-Ecosystem Compatibility: Built with Matter over Thread, the U400 can connect to multiple smart home platforms simultaneously, allowing you to enjoy the unique features of each ecosystem. Thread offers faster response, more stable connectivity, lower power consumption, and secure data transmission. Note: A Thread-enabled Matter controller from each ecosystem is required for its respective platform. Convenient Rechargeable Power System: Powered by a rechargeable and removable lithium battery that lasts up to 6 months per charge. Use the lock's USB-C port to recharge without taking the lock offline, or remove the battery and charge it separately. A low-battery voice alert will notify you when the battery drops below 20%, ensuring you never get caught off guard. Certified Security & Outdoor Durability: BHMA-certified for proven protection, mechanical strength, and long-term reliability. The IP65-rated exterior guards against dust and water for dependable outdoor performance. Plus, the rekeyable design allows you to change the physical key without replacing the entire lock cylinder. Unlock More Features with the Aqara App: Customize your security with Auto Lock, Night Latch Mode (only admins and physical keys can unlock at night), and Do Not Disturb Mode. Integrates seamlessly with Aqara cameras like the G5 Pro and G410 doorbell, allowing you to view visitors and unlock directly via live video interaction. See more product details
Pros
- Ultra-Wideband (UWB) spatial detection enables inside/outside awareness for more accurate auto-unlock behavior versus standard Bluetooth proximity locks
- Matter over Thread connectivity provides low-power, reliable mesh networking that doesn't depend on your home WiFi band staying stable
- Apple Home Key NFC support delivers a genuinely fast and polished tap-to-unlock experience natively within the Apple Wallet app
- USB-C rechargeable battery eliminates the inconvenience of disposable AA or 9V backup batteries common in competing deadbolts
- Supports five major platforms — Apple HomeKit, Alexa, Google Home, Home Assistant, and Matter — offering exceptional ecosystem flexibility
- Fingerprint keypad plus touchscreen PIN plus NFC plus physical key gives four independent backup access methods, reducing lockout risk
Cons
- At $269.99, it's a significant investment, and buyers without a Thread border router already in place won't fully leverage the Thread networking advantage
- Installation and UWB calibration are more complex than a standard deadbolt replacement, with some reviewers reporting 30-60 minutes of setup time
- Amazon rating of 4.1 stars from only 146 reviews is lower confidence than heavily reviewed alternatives; occasional app connectivity complaints appear in the review pool
- Touchscreen keypad and UWB module add exterior bulk compared to minimalist locks like the Level Lock+, which may not suit all door aesthetics
Who Is It For?
The Aqara U400 is best suited for Apple ecosystem households — particularly those with a HomePod mini or Apple TV 4K acting as a Thread border router — who want a premium, multi-method smart lock with genuine automation precision. It's also a strong fit for smart home enthusiasts running Home Assistant who want local Matter control without sacrificing fingerprint or NFC access. Buyers looking for a straightforward plug-and-play deadbolt upgrade or those on a tighter budget should look elsewhere.
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