Features 1??This is a smart biometric lock with four unlocking methods: fingerprint, password, Bluetooth APP and key. Semiconductor fingerprint sensor, can identify fingerprints in seconds, and 360?? self?learning memory algorithm, very accurate. 2??Smart door lock, can be used with other products that support Tuya function. 3??Password hidden handle design, 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, the password will automatically become invalid after unlocking. 4??Powered by 4pcs AAA batteries, longer standby time, the lock has USB charging port, supporting smart charging, simple and convenient, when the battery power is low, the smart lock will sound a low power alarm. 5??There is an invisible virtual password. Enter garbled codes before and after the password, as long as there is a continuous correct password in the middle, the door can be unlocked and opened, effectively preventing criminals from peeping and trying to open the door. 6??Support real?time monitoring, after the user unlocks, the administrator can check the record in the unlock record on the APP. Specification Condition: Item Type: Fingerprint Lock Material: Zinc Alloy Color: As Pictures Shown Diameter: Approx. 68mm (2.7in) Length:Approx. 145mm (5.7in) Width:Approx. 26mm (1in) Bluetooth Standard: Bluetooth 4.1BLE Support Mobile Phone System: For Android 4.3/ For IOS 7.0 Plus APP: TuyaSmart Fingerprint Capacity: 120 Number of Passwords: Custom Password: 120 APP Sending Password: Unlimited Power Supply: 4 x AAA Batteries (not included) Emergency Power Supply: USB Charging Recognition Speed: 0.5s Fingerprint Sensor: Semiconductor Service Life: >200,000 Times Unlock Method: Fingerprint/Password/Bluetooth App/Key Single Tongue Lock Body Center Distance: Approx. 60mm and 70mm (2.4in and 2.8in) (adjustable) Voltage Range: 4.5-10V Low Voltage Alarm Voltage: 4.8V Working Temperature: -20-70 Degrees Celsius Package List 1 x Fingerprint Lock Front Panel 1 x Back Panel 1 x Single Tongue Lock Body 1 x Lock Box 1 x Lock 1 x Manual 1 x Install Accessory Kit 1 x Square Steel Bar 1 x Card Pin 2 x Key