Aqara U400 UWB Smart Lock – Matter over Thread, Apple Home Key, Fingerprint & Touchscreen Keypad, Rechargeable Battery, HomeKit/Alexa/Google

Advanced access with true hands‑free unlock

Meet the Aqara U400, a modern smart lock that blends precise technology with everyday convenience. Ultra‑Wideband (UWB) sensing detects you as you approach, enabling a fast, contactless entry experience when your hands are full, gloves are on, or rain is falling. This seamless moment of entry adds a sense of calm to your routine, while still prioritizing security. Note: UWB unlock requires a Thread‑enabled Apple Home hub and compatible devices running the required software.

Flexible, all‑in‑one unlocking options

Choose from multiple entry methods to suit different scenarios without compromising security or reliability:

• Apple Home Key tap‑to‑unlock (requires a Thread‑enabled Matter controller such as HomePod 2nd Gen or Apple TV 4K)
• Fingerprint authentication for quick, hands‑free access
• Touchscreen passcodes for shared households or when you don’t want to carry a key
• Voice assistant control, app remote access, and NFC card support (card sold separately)
• Physical key backup for peace of mind

Matter over Thread: multi‑ecosystem compatibility

Designed with Matter over Thread, the U400 connects across multiple ecosystems while delivering faster responses, stable connectivity, and lower power consumption. Each ecosystem needs its own Thread‑enabled Matter controller to access its features, allowing you to tailor your smart home setup without sacrificing performance.

Power, durability, and ongoing security

A reliable rechargeable power system keeps you moving without frequent battery swaps. The removable lithium battery supports USB‑C charging for easy top‑ups, with a low‑battery alert to help you plan ahead. The lock is BHMA certified for strength and reliability, and IP65 exterior protection guards against dust and water for durable outdoor use. The rekeyable design enables key changes without replacing the entire cylinder, preserving flexibility and security as your needs change.

Smart app, automation, and camera integration

Use the Aqara app to tailor security and access, including Auto Lock for consistent protection, Night Latch Mode for controlled unlocks, and Do Not Disturb to keep entry quiet during sensitive times. When paired with Aqara cameras like G5 Pro or G410 doorbell, you can view visitors and unlock directly through live video interaction, creating a cohesive smart‑home experience.