Dingji 300R adopts 3D dynamic face recognition technology, near-field induction wake-up, night infrared collection, one-key switch door lock; with unique four-fold alarm function, can identify non-original keys, prevent "small black box" attacks, and prevent violence Lock picking alarm, forget to pull out the key alarm, at the same time it can be connected to the graffiti and thinkhome smart home, with wifi and NFC unlocking function.