1. Unlocking Methods:Both the elderly and children can use it, targeting different scenes and groups of people. Quick unlocking is available in multiple ways to use. 2. Smartphone App: Easily achieve intelligent life with home connectivity. User management - Add, delete users, change permissions; User password management - time setting, deletion, and viewing status; Control the unlocking record at all times, and remotely view the lock history through the mobile app; No need for internet connection, remote password sending to relatives and friends to unlock. 3. Normally Open Mode: Normally open mode, accessible at any time. It can be switched to the normally open mode, and can be opened directly without verification, making it convenient for different scenarios to use. Press the handle normally open button for 1 second to switch to normally open mode. 4. Emergency Charging Port and Backup Key: When the battery is severely low or completely depleted, don't worry. You can use the backup key to open the door and come with a USB-C charging port. It can also be connected to a mobile power source for temporary power supply. The door lock adopts a free handle design, which can prevent malicious violence from damaging the lock body and internal parts. The handle can be interchanged left and right; 5. Anti-peeping Design: password anti peeping design, input any password before and after the correct password, and only need to continuously input the correct password in the middle to open the door, effectively ensuring the personal safety of you and your family. High quality aluminum alloy lock head with sturdy structure to prevent illegal unlocking. Strong load-bearing capacity; Thickening and hardening, locking design to prevent external damage from others. APP:B: TUYA APP Bluetooth-compatible standard: Bluetooth-compatible 5.0Fingerprint head type: Semiconductor fingerprint head Recognition speed: 0.5s Number of users: /Passwords (100 sets) Emergency charging port: TYPE-C Battery capacity: 4 AAA Dry cell (not included) Number of administrators/users: 9 administrators, 91 users Mechanical keys: 2 Applicable categories: Wooden doors, room doors, etc Suitable door thickness: 30-55mm/1.18-2.16inch Working temperature: -25 C~70 C Colour:black Material:Metal+Plastic Package Contents: 1 x Smart Door 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.