1、The smart biometric lock includes four unlocking methods: fingerprint, password, Bluetooth APP and key. Real‑time monitoring, after the user unlocks, the administrator can check the record in the unlock record on the APP. 2、Semiconductor fingerprint sensor, second‑speed fingerprint recognition, 360° learning and memory algorithm, the more you use it, the more accurate it is. For Tuya smart door lock, can be used with other products that support for Tuya function. 3、With a password hidden handle, you can set a temporary dynamic password. If you need to unlock the lock remotely, you can set one or a group of dynamic passwords, and the password will automatically become invalid after unlocking. 4、800mAh rechargeable lithium battery power supply, longer standby time. USB charging port, smart charging, simple and convenient. Low voltage alarm, when the battery power is low, the smart lock will emit a low battery alarm sound. 5、It has an invisible virtual password. Enter garbled codes before and after unlocking the password. As long as there is a continuous correct password in the middle, the door can be unlocked and opened, effectively preventing thieves from trying to open the door. Item Type: Fingerprint Lock Material: Zinc Alloy Bluetooth Standard: Bluetooth 4.1BLE Supported Mobile System: For Android 4.3/ iOS 7.0 or above APP: For TuyaSmart Fingerprint Capacity :40 PCS Number of Password: Custom Password: 40 groups APP Send Password: Unlimited Power Supply: 800mAh rechargeable lithium battery (built-in battery) Emergency Power Supply: USB charging Recognition Speed: 0.5s Fingerprint Sensor: Semiconductor Service Life: >200 thousand timesLock Mode: Fingerprint/password/Bluetooth APP/key Single Tongue Lock Body Center Distance: Approx. 60mm/2.4in Applicable Door Thickness: Approx. 35 - 50mm/1.4 - 2.0in Operating Temperature: -20℃ - 70℃ 1 x Fingerprint Lock Front Panel 1 x Rear Panel 1 x Single Tongue Lock Body 1 x Lock Box 1 x Lock Catch 1 x Instruction 2 x Install Accessory Pack 1 x Square Steel Bar 2 x Key