Xiaomi has launched the Smart Door Lock 4 Pro Dual Camera Edition in China. This upgraded version builds on the Smart Door Lock 4 Pro that debuted earlier this year, adding improved hardware. It is priced at 2,899 yuan ($407) and is now available for pre-orders on Xiaomi Youpin.

Xiaomi Smart Door Lock 4 Pro Dual Camera Edition Specs

The lock features AI palm vein recognition technology, which uses near-infrared light to detect unique palm vein patterns. Xiaomi claims the system has a false rejection rate of less than 0.001% and can unlock in under one second. The lock also supports AI 3D face recognition, which is certified by the BCTC Financial Security Test. The facial recognition system works in low light and includes 3D liveness detection to prevent spoofing attempts with photos or videos.

Xiaomi has equipped the lock with a dual-camera peephole setup. The main 3MP camera offers a 160° ultra-wide view, while the secondary 2MP camera covers a 128° angle. This design allows users to see both people standing at the door and packages or objects left on the ground.

The system supports dynamic night vision with five infrared LEDs and switches between color night mode and infrared imaging based on lighting conditions. It comes with a built-in 24GHz millimeter-wave radar sensor that detects motion near the door and automatically records video when someone stays nearby.

Inside the home, the lock includes a 3.97-inch display for real-time video monitoring. It can connect with Xiaomi TVs, smartphones, and smart displays, allowing users to answer calls, view visitors, and unlock remotely through the Mi Home app. It supports up to twelve unlocking methods, including palm vein, 3D face, fingerprint, NFC, Bluetooth, remote unlocking, long-term and temporary passwords, access cards, and mechanical keys. The NFC function works with compatible Xiaomi and Redmi phones, watches, and smart bands.

The lock runs on a dual power system combining a 6,870mAh lithium battery and four AA batteries, offering up to six months of use. Both indoor and outdoor units include USB-C ports for emergency or continuous charging. It also features a quiet automatic lock, C-level anti-pry cylinder, full-door state sensors, and alerts for tampering or failed unlocks.

The Xiaomi Smart Door Lock 4 Pro Dual Camera Edition works with HyperOS Connect for smart home automation. It supports features such as automatic lights, welcome voice prompts, and away-mode security settings.

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(Xiaomi Youpin)