3D Fingerprint
The biometric reader on the handle is now faster (99% accuracy) and has self-learning to recognize your finger better with use.
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The first Apple HomeKey lock that unlocks without touch. It detects your presence with millimeter-precision UWB and integrates with everything thanks to Matter.
Welcome to true frictionless entry. The Aqara Smart Lock U400 redefines convenience with its revolutionary UWB (Ultra-Wideband) technology. Unlike traditional Bluetooth, which can be slow or insecure, UWB allows your door to unlock automatically with surgical precision exactly as you approach, without needing to take your iPhone or Apple Watch out of your pocket. It's like having an invisible doorman who knows exactly when you arrive home.
Forget constantly buying batteries. The U400 incorporates a high-density rechargeable lithium battery that lasts up to 6 months and charges via USB-C. Plus, it's one of the most connected locks in the world: it comes with native Matter over Thread. This means ultra-fast connection, greater range, and full compatibility not only with Apple Home, but also with Alexa, Google Home, and SmartThings without relying on old hubs.
Real magic. If you have an iPhone (11 or later) or Apple Watch (Series 6 or later), the door will open automatically upon detecting your proximity and intent to enter. No more shopping bags on the ground to search for keys.
It still supports the classic 'Tap to Open' feature of Apple Wallet. If your iPhone battery runs out, you can still open using the phone's power reserve.
Eco-friendly and powerful. Its removable battery lasts for months. Emergency? It has an external USB-C port to provide temporary power with a power bank if you forgot to charge it.
Multiple access methods in a armored design.
The biometric reader on the handle is now faster (99% accuracy) and has self-learning to recognize your finger better with use.
The new smart home standard. Instant response and secure local connection that doesn't saturate your Wi-Fi. (Requires a Border Router).
Pure aesthetics. The keypad numbers only appear when you touch the matte black surface, maintaining a clean and minimalist look on your facade.
Classic peace of mind. Includes physical keys and a hidden cylinder so you always have a guaranteed traditional access method.
| Model | Aqara Smart Lock U400 |
| Technology | UWB (Ultra-Wideband) |
| Connectivity | Matter over Thread / BT 5.1 / NFC |
| Access | UWB, HomeKey, Fingerprint, Code, Key |
| Power | Rechargeable Lithium Battery (USB-C) |
| Resistance | IP65 (Rain/Dust) |
| Compatibility | HomeKit, Alexa, Google, SmartThings |
The U400 has UWB (unlocks automatically when you approach without touching anything) and uses a rechargeable battery. The U100 requires 'tapping' with a mobile device (NFC) and uses 4 AA batteries. The U400 also has a more refined and modern design.
No. UWB technology is smart; it detects distance and direction. It knows if you are inside or outside the house, preventing accidental openings if you pass near the door from the inside.
Yes, the U400 includes a hidden mechanical cylinder and two traditional physical keys for emergencies, just like a conventional lock.