Imagine approaching your front door, hands full of groceries, children clinging to your legs – and the door simply unlocks. Aqara’s new Smart Lock U400 makes this a reality, pioneering a new level of convenience with its innovative hands-free unlocking system.
This isn’t just another smart lock; it’s the first of its kind to seamlessly integrate Apple Home Key technology with Ultra-wideband (UWB) radio. This combination allows for truly effortless access, recognizing authorized users as they approach, eliminating the fumble for keys or phones.
The secret lies in precision. The U400 utilizes UWB to measure the exact time and angle of radio signals between the lock and your iPhone or Apple Watch, pinpointing your location with centimeter-level accuracy. This prevents accidental unlocking from inside the house or simply walking by.
Security is paramount. Aqara emphasizes that UWB technology offers enhanced protection against relay attacks, a common vulnerability in Bluetooth-based proximity systems. This provides peace of mind alongside the convenience.
For those not fully immersed in the Apple ecosystem, the U400 offers a wealth of alternative unlocking methods. Users can utilize the Aqara app, a traditional PIN code, fingerprint scanning, or even a physical key.
Beyond unlocking, the U400 is designed for everyday reliability. A built-in gyroscope automatically locks the door once closed, preventing accidental oversight. The rechargeable battery provides up to six months of power, with a USB-C emergency backup for temporary access.
Aqara isn’t stopping at Apple. Support for Samsung Wallet is planned for early 2026, expanding compatibility to a wider range of users. Currently, the lock also supports NFC unlocking with smartphones or key cards.
Built to withstand the elements, the exterior keypad boasts an IP65 rating, making it dustproof and resistant to water spray. It’s designed to fit standard doors, accommodating thicknesses from 35mm to 55mm.
The Smart Lock U400 isn’t just about futuristic technology; it’s about simplifying daily life. It’s a subtle yet powerful upgrade that transforms a routine task into a seamless experience.
