CES 2026: Aqara U400 Smart Lock Ditches Keys Forever With UWB Matter Technology

Ultra-wideband (UWB) enables precise location-based tracking and automated door opening as users approach. Detection occurs within one to two feet of the door, with customization options to limit opening from specific approach angles. UWB uses time-of-flight signals rather than signal strength, preventing relay attacks and enhancing security compared to Bluetooth.

UWB enables precise, secure door tracking within one to two feet, using time-of-flight signals to prevent relay attacks and support angle-based access control.

Lock determines exact position and opening intention through range and angle measurements, avoiding accidental or delayed openings. iPhone or Apple Watch does not require explicit tapping or authentication when UWB is enabled. True Hands-Free Unlocking adds convenience by automatically unlocking the door as authorized users approach, even with full hands or in adverse weather.

Apple Home Key Integration and Compatibility

Apple Home Key can be added to Wallet for access via iPhone or Apple Watch, functioning even when devices are powered off. Home Key can be customized to open by holding iPhone or Apple Watch near the lock, though UWB simplifies this further. Matter-compatible devices ensure seamless interoperability across smart home platforms.

Matter and Thread compatibility enables seamless integration with HomeKit and control through Apple Home app. Apple Thread-enabled Matter controllers required include HomePod 2nd Gen, HomePod mini, or Apple TV 4K 2021/2022. Lock supports Aliro standard, allowing opening with smartphones regardless of operating system. Like many devices in the Alexa ecosystem, Aqara U400 integrates with multiple voice assistants for enhanced control options.

Multiple Opening Methods and Access Options

Built-in fingerprint reader stores up to 50 fingerprints with 98.6% recognition accuracy. Access methods include NFC card support, keypad with anti-peep password protection, voice assistant control, and physical key.

One-time and time-specific access codes can be generated for guests. App-based remote access through Aqara app enables control from anywhere. Physical key design allows rekeying without replacing the entire lock cylinder.

Battery Performance and Power Management

4,880 mAh rechargeable lithium-ion battery provides up to six months of battery life per charge. Battery can be removed and charged via USB-C, with 6-hour charge time and 8-month standby duration.

USB-C emergency power port guarantees access during battery depletion. Rechargeable battery represents an upgrade from previous Aqara locks using replaceable batteries. Battery status can be monitored remotely through Aqara app.

Security Features and Certifications

BHMA certification confirms proven protection, mechanical strength, and long-term reliability. AES-128 encryption protects against unauthorized access.

Night Latch Mode restricts opening to admins and physical keys only during nighttime hours. IP65 rating provides exterior water and dust resistance for dependable outdoor performance. Auto-lock feature prevents doors from remaining open if accidentally activated.

Smart Home Integration and Automation Features

Matter over Thread connectivity enables integration with Apple Home, Aqara app, and other smart home ecosystems. Automations can be created alongside other smart home devices, with Siri voice command support.