3 Minutes
Xiaomi has unveiled a new smart lock that uses AI-driven 3D face recognition and infrared palm-vein scanning to unlock your door in under a second. Built to be fast, secure, and deeply integrated with Xiaomi's smart-home ecosystem, the Smart Door Lock 4 Pro Dual Camera Edition targets users who want both convenience and higher-level biometric protection.
Two cameras, smarter sensing — and a sharp eye for details
The Dual Camera Edition pairs a 3-megapixel, 160° wide-angle sensor with a secondary 2-megapixel, 128° lens so the lock can fully capture people and packages at the door. Night vision and a 24 GHz millimeter-wave radar add another layer of detection: the radar tracks nearby motion and triggers automatic recording if a person lingers suspiciously.
Biometrics that go beyond fingerprints
Beyond the traditional fingerprint reader, this model reads palm veins using infrared illumination and runs AI-based 3D face recognition. Xiaomi says the system unlocks in less than one second and boasts a false acceptance rate under 0.001%. Liveness detection is built in, so photos or videos can’t defeat the sensors — a key reassurance for real-world use.
Works with HyperOS Connect and Mi Home
Powered by HyperOS Connect, the lock integrates with Xiaomi’s smart-home platform. You can view a live feed from the front door via the Mi Home app, a Xiaomi phone, or even a Mi TV, and unlock remotely when needed. The lock supports a dozen ways to open the door, including NFC, fingerprint, PIN code, and a mechanical key for backup.
- AI 3D face recognition + infrared palm-vein scanning
- Dual cameras with night vision and wide coverage
- 24 GHz millimeter-wave radar for motion detection
- 12 unlocking methods: NFC, fingerprint, passcode, key, and more
Power, durability and anti-tamper security
Practicality is part of the package: the lock uses a hybrid battery system (lithium plus AA) that Xiaomi claims lasts up to six months, and it also supports USB-C charging. Additional safety features include a silent auto-lock mode, an anti-tamper cylinder, and intrusion alerts, which together aim to make this one of the more complete smart locks on the market.
Available on Xiaomi Youpin for around $407, the Smart Door Lock 4 Pro Dual Camera Edition is clearly pitched at buyers who want advanced biometrics and deep smart-home integration without sacrificing everyday convenience. Imagine opening your door in a fraction of a second — without keys, without fumbling for your phone, and with added defenses against spoofing attempts. That’s the experience Xiaomi is selling.
Why this matters
As smart-home devices grow smarter, biometrics are moving from novelty to necessity. Tools like palm-vein recognition and radar-based motion sensing reduce false alarms and thwart common spoofing tricks. Whether you’re upgrading an apartment door or outfitting a new house, these features make a difference in both security and daily ease-of-use.
Comments
bioNix
Wow opening a door in a blink! cool tech, but $407 and Xiaomi lock-in.. battery 6 months ok but USB-C for emergency? curious if it resists tampering
mechbyte
AI face + palm veins in under a sec? sounds impressive, but where does the biometric data live, cloud or local? privacy and false accepts worry me..
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