1. Multiple methods of unlocking: Tuya App/Fingerprint/ mechanical key/Password unlock; easy to use it whether children or older. Never worry forget to bring the key. 2. Tuya APP Temporary Password Remote Control: This keyless entry door lock allows you to check the visitor records on Tuya APP, see which visitor at what time unlocked the door, enhance the security level of your home. 3. Set timed automatic locking in Tuya APP, Auto lock Delay:5s, 6s, 7s, 8s, 9s ... 4. Mechanical keys and emergency power supply (Type-C) can be used when the door lock is out of power 5. Long battery life, 4 pcs AA batteries(Not included) can provide 5000 openings (approx. 6 months). Upgraded anti-touch feature. Unlock as long as the numbers you enter contain the correct sequential code. Lock Name: Bluetooth Smart Deadbolt Unlocking method: fingerprint, key,Password,Tuya App Fingerprint capacity: 20 Password capacity: 60 Mechanical key: 2 Network: Bluetooth Application support: Tuya and Smartlife Operating system: Android&iOS Alarm type: low battery alarm Emergency power supply: Type-C Door opening direction: Universal left and right Application environment: Wooden doors, aluminum alloy doors, metal doors etc Applicable door thickness: 35-55mm Power supply:4 x AA batteries (not included) Working temperature: -20 to +50°C Working humidity: 40% to 85% (No condensation) Colour:Black Material:plastic+metal type: A/B/C Package Contents: 1 x Smart Digital Lock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.