Smart locks / Aqara

Aqara Smart Lock U400

A Thread deadbolt with Apple hands-free entry and separate phone-tap features.

Listed in Australia, United States, Canada
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Aqara Smart Lock U400 front and rear assemblies in black.

Photo: Aqara

Model and local version

US and Australian U400 model researched.

Connections: Matter, Thread, NFC, UWB, Bluetooth

What it can do

Shared setup

  • Compatible iPhone or Apple Watch.For Apple Wallet NFC tap; Apple family home-key sharing.
  • US and Australian U400 model.For Apple Wallet NFC tap; Apple UWB hands-free; Samsung Wallet NFC tap; Apple family home-key sharing; Matter ecosystem control; Aqara Home nearby; Guest keypad passcodes.
  • A compatible Apple Home hub is required.For Apple UWB hands-free; Apple family home-key sharing.
  • A compatible Thread border router is required.For Apple UWB hands-free; Samsung Wallet NFC tap; Matter ecosystem control.

Features and the setup they need.

Features, setup and recorded confirmation
Feature & setupConfirmation & sources

Apple Wallet NFC tap

Apple Home

Tap an eligible iPhone or Apple Watch to unlock with an Apple home key.

What you’ll need

  • iOS 17.1 or later.
  • watchOS 10.1 or later.
  • Thread border router, or an eligible Thread-enabled iPhone running iOS 18+ for setup.

How to use it

  • Pair in Apple Home using a Thread home hub/border router, or a supported Thread-enabled iPhone; then add the home key.
✓ Confirmed

Apple UWB hands-free

Apple Home

Unlock automatically as an eligible UWB iPhone or Apple Watch approaches from outside.

What you’ll need

  • Compatible UWB iPhone or Apple Watch.
  • iOS 18.5 or later.
  • watchOS 11.5 or later.

How to use it

  • Pair in Apple Home and enable Unlock on Approach in Apple Wallet.
✓ Confirmed

Aqara · 2026-10-25

Samsung Wallet NFC tap

SmartThings

Tap a compatible Galaxy phone to unlock with a Samsung Wallet home key.

What you’ll need

  • Compatible Galaxy phone with Samsung Wallet.
  • Compatible Samsung Matter gateway.
  • U400 firmware v3104 and supported Samsung Wallet versions: Global 6.4.30 or Korea 5.9.02. A Samsung gateway is required.
✓ Confirmed

Apple family home-key sharing

Apple Home

Share Apple home keys with residents through Apple Home.

What you’ll need

  • Thread border router for the U400 connection.

How to use it

  • Invite eligible residents to your Apple Home.
✓ Confirmed

Aqara · 2026-10-25

Matter ecosystem control

Matter

Control the lock through Apple Home, Google Home, Alexa, SmartThings or Home Assistant.

What you’ll need

  • A Matter controller for the chosen ecosystem is required.

How to use it

  • Add U400 in the chosen Matter app.
✓ Confirmed

Aqara · 2026-10-25

Aqara Home nearby

Manufacturer app

Manage U400 nearby over Bluetooth in Aqara Home without a hub.

What you’ll need

  • Use the phone app.
  • iPhone or Android phone.

How to use it

  • Enable Bluetooth, press Set and add U400 in Aqara Home.
✓ Confirmed

Aqara · 2026-10-25

  • Smart Lock U400 User Manual ↗

    Current Aqara Support Center download. Confirms nearby Bluetooth setup without a hub and separate Thread-controller requirements for remote features.

Aliro 1.0 certification

Device feature

CSA records U400 certification on 24 March 2026 for hardware 1.0.0 and firmware 3.1.0.4. This establishes a certification record, not every wallet feature.

✓ Confirmed

Connectivity Standards Alliance · 2026-10-25

Guest keypad passcodes

Device feature

Give guests one-time or recurring keypad passcodes.

How to use it

  • Add guest passcodes in Aqara Home.
✓ Confirmed

Aqara · 2026-10-25

Other integrations and limits (1)
Features, setup and recorded confirmation
Feature & setupConfirmation & sources

Samsung UWB hands-free

SmartThings

Aqara's March announcement promised Samsung hands-free UWB in Q2 2026. A completed product-specific rollout was not verified; the elapsed date does not prove delivery.

What you’ll need

  • Recheck Aqara's release notes and exact Galaxy eligibility. Aliro certification alone is insufficient.
◷ Announced

Aqara official announcement · 2026-10-25

Where we checked

Features are based on the linked manufacturer documentation. Household results also check the equipment and software you select. How we check.