User-friendly and Multifunction: Easy to add or delete users in seconds. All Settings can be easily operated on the administrator's app, include adding fingerprints, voice interaction, custom passcode, unlock records tracking, passage/user mode, auto lock delay time, etc. [EMERGENCY CHARGING] The keyboard door handle needs 4 AAA batteries (Not included), it has a low battery alarm function and comes with a USB port for emergency charging. Advanced: Using the latest version of the biometric fingerprint sensor on the fingerprint lock, 0.1s scanning time, and instant unlock. With the LED Touch Keypad, you can enter codes even in darkness. Easy to Install: No wiring, no drilling and save cost of the locksmith, you can easily install the keypad lock by yourself with just one screwdriver. [360°Fingerprint Identification] lever lock possesses a more sensitive fingerprint reader, which can recognize your fingerprint in just 0.3 seconds and unlock your 1 second. It's faster than groping for the key. Great smart devices for home, hotel, apartment and Suitable door thickness:35-50MM (if the door thickness exceeds the above range, please note the specific door thickness to adapt to the appropriate screw accessories). Unlocking methods: fingerprint unlocking and mechanical key unlocking, number of fingerprint groups: 30 groups. The mechanical key must be properly outside the door. Other functions: normally open mode selection (in normally open mode, the door lock is always open) Buzzer sound prompts, indicating light navigation, Weight: 1.62480687094 Pounds, Manufacturer: Aisuoka