Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400
Smart Lock U400

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Smart Lock U400

$374.99 CAD
Color Black
$374.99 CAD Save

Grab a bundle & save up to 26%!

  • True Hands-Free Unlocking with UWB Technology: Experience a new era of smart access — UWB (Ultra-Wideband) detects your incoming presence, direction, and intent to unlock automatically as you approach. It provides a faster, more convenient, and highly secure way to enter your home without touching the lock. Perfect when your hands are full, you're wearing gloves, or arriving in the rain. (Note: UWB unlocking requires a Thread-enabled Apple Home hub and is supported on Apple Watch Series 6 or later (excluding SE) running watchOS 11.5+ and iPhone 11 or later (excluding iPhone SE & iPhone 16e) running iOS 18.5+.)
  • All-in-One Unlocking Options: Enjoy Apple home key tap-to-unlock (requires an Apple Thread-enabled Matter controller: HomePod 2nd Gen, HomePod mini, or Apple TV 4K 2021/2022), plus fingerprint, touchscreen passcode, voice assistant control, app remote access, NFC card support (card sold separately), and a physical key, giving you flexible, reliable ways to enter your home in any situation.
  • Matter Over Thread for Multi-Ecosystem Compatibility: Built with Matter over Thread, the U400 can connect to multiple smart home platforms simultaneously, allowing you to enjoy the unique features of each ecosystem. Thread offers faster response, more stable connectivity, lower power consumption, and secure data transmission. Note: A Thread-enabled Matter controller from each ecosystem is required for its respective platform.
  • Convenient Rechargeable Power System: Powered by a rechargeable and removable lithium battery that lasts up to 6 months per charge. Use the lock's USB-C port to recharge without taking the lock offline, or remove the battery and charge it separately. A low-battery voice alert will notify you when the battery drops below 20%, ensuring you never get caught off guard.
  • Certified Security & Outdoor Durability: BHMA-certified for proven protection, mechanical strength, and long-term reliability. The IP65-rated exterior guards against dust and water for dependable outdoor performance. Plus, the rekeyable design allows you to change the physical key without replacing the entire lock cylinder.
  • Unlock More Features with the Aqara App: Customize your security with Auto Lock, Night Latch Mode (only admins and physical keys can unlock at night), and Do Not Disturb Mode. Integrates seamlessly with Aqara cameras like the G5 Pro and G410 doorbell, allowing you to view visitors and unlock directly via live video interaction.
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The Definitive Hands-Free Unlocking Experience

Powered by Ultra-Wideband (UWB), the Smart Lock U400 unlocks as you approach with your iPhone or Apple Watch — a hands-free, privacy-preserving entry experience with no codes and no biometric checks. As an Aliro enabled lock, UWB unlocking will extend to more devices across different ecosystems.

*UWB unlock works with select iPhone and Apple Watch models and requires a Thread-enabled Apple home hub (e.g., HomePod mini or Apple TV 4K).

Hands Full

Effortlessly walk right in without setting down your belongings, as the door automatically unlocks upon your approach with authorized device.

Raining Heavily

Avoid the struggle of searching for keys or operating a touchscreen in a downpour with the UWB lock's hands-free, proximity-based unlocking.

Wearing Gloves

No longer will you need to fumble with your gloves to use keys or keypads, the U400 unlocks on approach.

Unlocks Only When It Should

Based on range and angle measurements, UWB detects your exact position and also understands your unlock intention. It unlocks precisely when you're ready to enter and avoids any accidental or delayed openings.

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Additional Unlocking Options, Choose Your Preferred Way

Tap to Unlock with Home Key in Apple Wallet

Simply add the Apple home key to your Wallet and unlock your door with your iPhone or Apple Watch—even when the devices are powered off. You can also easily share the home key with family members or provide guest codes to visitors, ensuring both security and convenience.

Fingerprint Unlocking in 0.3 Seconds

The Smart Lock U400 also features a built-in ergonomic fingerprint reader, which can securely store up to 50 fingerprints for quick touch-to-open access. The lock offers a highly accurate recognition rate of up to 98.6%.

Permanent Password

Offline Password

Scheduled Password

App Control

Voice Control

Mechanical Key

NFC Card

Automation

*The keypad supports Anti-Peep password protection.

Matter over Thread Support

Powered by Matter over Thread, the Smart Lock U400 works by design with Apple Home, Home Assistant, Google Home, Amazon Alexa, Samsung SmartThings and other ecosystems, ensuring stable andreliable performance.
Samsung Wallet will be supported on the U400 in Q1 2026, allowing users to use a compatible Samsung device as a digital key.

*To use the device with a particular Matter ecosystem, 

a Thread-enabled Matter Controller of this ecosystem is required.

Personalize Your Smart Living

Create personalized smart home scenarios by linking your U400 with other Aqara devices.

Enhanced Security with Aqara Doorbell

The Smart Lock U400 integrates with the Aqara Doorbell Camera Hub G410 allowing you to see who is at the door and unlock directly from the Apple Home app.

Open the Door, Activate Your Home

You can set up 'When, if, then' rules to trigger intelligent interactions based on real-time actions, for example, set the lights to turn on automatically when the door opens.

Convenient and Sustainable Batteries

Rechargeable Battery

Our smart lock is equipped with rechargeable batteries that only requires a few hours to fully charge, and it can last up to 6 months on a single charge.

Easy Recharging

With a built-in USB-C port, you can charge your lock indoors with a power bank anytime you need. No need to remove the battery or the cover.

Low Battery Warning

When the battery level drops to 20%, you'll receive a low battery notification, giving you plenty of time to recharge before running out.

Emergency Charging

In case you forget to recharge, the U400 lock features a USB-C
Emergency Charging Port, allowing you to power up with a power bank or a phone that supports USB-C to USB-C power supply.

Advanced Aqara Home App Features

Auto Lock on Close

With a built-in gyro sensor, the lock detects when the door is closed and locks automatically, no additional contact sensor needed.

Night Latch Mode

Only the admin can unlock the door, preventing exterior keyless entry while allowing free exit from inside, perfect for a secure night's sleep.

Do Not Disturb Mode

Mute all general alerts during the set time, while still notifying for forced entry, door left ajar, or other critical events.

BHMA Certified



The U400 lock is proven to meet the industry standard for reliable residential security, ensuring durability and peace of mind.

IP65 Weatherproof (Outer Panel)

Engineered to withstand dust, splashes, and heavy rain, U400 delivers reliable performance even in demanding outdoor environments.

Rekeyable Design

This lock can be rekeyed, allowing you to change the physical key without replacing the entire lock cylinder.

Easy Installation

Compatible with single-cylinder deadbolt locks.
Modifications may be necessary if the door has different dimensions.
Please make sure to install the strike plate provided.