Aqara · Smart Lock

Aqara UWB Smart Lock U400 compatibility: what it works with

Amazon Alexa: Works Google Home: Works Apple Home: Works Samsung SmartThings: Works
Check price on Amazon US → Last seen $219.99 · 2026-10-08

Matter Over Thread, Rechargeable Battery, Keyless Entry Deadbolt, Supports HomeKit, Alexa, Google, Home Assistant

Matter: Yes — the device itself is Matter certified. source
Hub required: Yes

Does the Aqara UWB Smart Lock U400 work with Amazon Alexa?

Works · Via Matter

What you lose: Requires a Thread-enabled Matter controller from Amazon (e.g. a Thread-capable Echo); UWB hands-free unlock and Home Key are Apple/Samsung-only features.

Confidence: High · Source: Manufacturer documentation (link) · Verified 2026-10-20

Check price — Aqara UWB Smart Lock U400 →
Have you tested the Aqara UWB Smart Lock U400 with Amazon Alexa? Tell us
Reviewed by a person before anything is published. Shown as "user reports", never as verified.

Does the Aqara UWB Smart Lock U400 work with Google Home?

Works · Via Matter

What you lose: Requires a Thread-enabled Matter controller from Google (e.g. Nest Hub 2nd gen); UWB hands-free unlock and Home Key not available via Google Home.

Confidence: High · Source: Manufacturer documentation (link) · Verified 2026-10-20

Check price — Aqara UWB Smart Lock U400 →
Have you tested the Aqara UWB Smart Lock U400 with Google Home? Tell us
Reviewed by a person before anything is published. Shown as "user reports", never as verified.

Does the Aqara UWB Smart Lock U400 work with Apple Home?

Works · Via Matter

What you lose: UWB unlock works with select iPhone/Apple Watch models and requires a Thread-enabled Apple home hub (HomePod mini or Apple TV 4K).

Confidence: High · Source: Manufacturer documentation (link) · Verified 2026-10-20

Check price — Aqara UWB Smart Lock U400 →
Have you tested the Aqara UWB Smart Lock U400 with Apple Home? Tell us
Reviewed by a person before anything is published. Shown as "user reports", never as verified.

Does the Aqara UWB Smart Lock U400 work with Samsung SmartThings?

Works · Via Matter

What you lose: Requires a Thread-enabled Matter controller from Samsung (e.g. SmartThings Hub/Station); Samsung Wallet Digital Home Key only when connected via SmartThings.

Confidence: High · Source: Manufacturer documentation (link) · Verified 2026-10-20

Check price — Aqara UWB Smart Lock U400 →
Have you tested the Aqara UWB Smart Lock U400 with Samsung SmartThings? Tell us
Reviewed by a person before anything is published. Shown as "user reports", never as verified.

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Last verified: 2026-10-20. Labels, confidence levels and the Matter inference rule are explained in our methodology. Spotted something wrong or tested a combination we haven't? Use "Tell us" under the platform above — reports are reviewed before anything is published.