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Aqara U400 Smart Lock
Aqara U400 Smart Lock
The Aqara U400 is the first lock I’ve used that makes UWB walk-up unlock feel like what we all wanted Bluetooth to be. It also checks the protocol boxes I care about—Matter for multi-admin flexibility, Thread for reliability, and even Aliro readiness for future-proofing.
Pros
- +UWB walk-up unlock feels fast and intentional with a tight radius
- +Matter support enables multi-admin across platforms/controllers
- +Thread connectivity for a more reliable smart home mesh
- +Works well with Apple HomeKey Express mode and guest access in Apple Home
- +Door sensor helps it lock only after the door is actually closed
Cons
- -Not perfect—UWB intent/approach logic can still unlock in edge cases when stress testing
- -Occasionally unlocks a moment later than I’d like
- -Aliro isn’t usable yet (as of mid-January 2026)
Featured in this video
Aqara U400 Smart Lock
Available on Amazon
External purchase
Highlights
- +UWB walk-up unlock feels fast and intentional with a tight radius
- +Matter support enables multi-admin across platforms/controllers
- +Thread connectivity for a more reliable smart home mesh
Recommended by
Make Smart Matter