Aqara U400 Smart Deadbolt Lock – Advanced Keyless Entry
The Aqara U400 Smart Deadbolt Lock brings several convenient ways to secure and access your home, while supporting both indoor and outdoor applications. Designed for smart home users, it combines modern access control with practical backup options, so you are not limited to a single unlocking method.
Aqara U400 Smart Deadbolt Lock Features
| Specification | Details |
| Product Name | Aqara Smart Lock U400 |
| Unlocking Methods | UWB, Apple Home Key, fingerprint, PIN, NFC, Bluetooth, app, mechanical key, automation and voice control |
| Available Colour | Grey |
| Security Certification | BHMA Grade 3 |
| Wireless Connectivity | Bluetooth, Thread, UWB and NFC |
| Battery | Rechargeable Li-ion battery |
| Smart Home Protocol | Matter over Thread |
| Fingerprint Capacity | Up to 50 fingerprints |
| Fingerprint Recognition | 0.3-second unlocking; up to 98.6% recognition accuracy |
| Outer Panel Protection | IP65 |
| Operating Humidity | 0–95% RH, non-condensing |
| Charging / Backup Power | USB-C |
| Auto-Lock | Supported through built-in gyroscope |
| Mechanical Key | Supported; rekeyable cylinder |
| Inner Panel Dimensions | 178 × 76 × 46.9 mm |
| Outer Panel Dimensions | 167 × 76 × 25.5 mm |
| Operating Temperature | -18°C to 55°C |
| Compatible Door Type | Single-cylinder deadbolt; installation suitability depends on door dimensions |
| Recommended Door Thickness | 35–55 mm for the wooden-door |
| Optional Hub | Aqara Hub M100, depending on selected package |
| Package Contents | U400 lock, rechargeable battery/batteries, keys, mounting plate, accessories, bolt and screw kit, installation diagram and user manual; M100 Hub included with selected versions |
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