Unlocking methods:face recognition, fingerprint, password,IC Card, key, APP Fingerprint type: semiconductor fingerprint sensor Recognition speed:<0.5s Recognition error:<0.001% Unlock times: Over 600000 times Fingerprint capacity: 100 pieces Card type: IC card Working temperature: -10 ? -75 ? Working temperature: 5% -95% Emergency power supply: USB interface Power Supply: Rechargeable lithium battery (Included in package) Waterproof Grade: IP68 Material: Aluminum alloy Emergency Power Supply:with micro Type C interface to supply power if the batteries run out APP: Tuya APP Infrared light face recognition, fast unlocking, can also be used at night, wide angle, and children with low height. It is forbidden to use photos, molds, etc. to unlock Press the Doorbell on the lock and it will automatically send the image to the indoor screen and app. You can see who is visiting and unlock remotely.