Powered by advanced UWB technology, the Aqara Smart Lock U400 transforms your phone into a proximity-based digital key. No taps, no codes—just approach, and the lock verifies your presence in real time, unlocking with pinpoint accuracy. The future of seamless, intelligent access starts here. | Aqara | | UWB Smart Lock U400 Kit with M100 Hub, Matter, Thread, Wifi, Apple Home Key, Fingerprint, Rechargeable Battery | Black | Best Buy