Meguard Fingerprint Knob with App,Code,Backup, Keyless Handle Smart Door Lock

[4 Ways To Unlock]: Smart Door Lock 4-in-1 with fingerprint + password + app + Key(2 include), fingerprint recognition rate up to 98% and open the door just need 1 second. You can add 50 groups fingerprints, Eliminate the trouble of forgetting to bring the key when you go out. [EASY INSTALLATION]: Fingerprint door lock is designed to fit US standard door, Backset 2-3/8?(60mm) and 2-1/8?(70mm), door thicknesses from 1-3/8'' to 2-1/8''(35mm -55mm). No wiring and no drilling. Fit both left handed and right handed doors. [UNLOCK WITH SAMRT APP]: You can use mobile phone to unlock, or you can set a temporary password and share it with friends, visitors or housekeepers. This smart door lock is very suitable for families, hotels, schools and garages. Support ios and android devices. [EMERGENCY CHARGING]: Keypad door knob requires 4 AAA batteries (included), it has low battery reminder function, equipped with a USB interface for emergency charging.