4 Ways To Unlock: Door Lock 4-in-1 with fingerprint + password + app + Key(2 include), fingerprint recognition rate up to 99.8% and open the door just need 1 second. You can add 150 groups fingerprints, Eliminate the trouble of forgetting to bring the key when you go out. EASY INSTALLATION: Fingerprint door lock is designed to fit all of standard door, No wiring and no drilling. Fit both left handed and right handed doors.(With English/Portuguese language instructions) UNLOCK WITH APP: You can use mobile phone to unlock, or you can set a temporary password and share it with friends, visitors or housekeepers. This door lock is very suitable for families, hotels, schools and garages. EMERGENCY CHARGING: Keypad door knob requires 4 AAA batteries (included), it has low battery reminder function, equipped with a USB interface for emergency charging. LANGUAGE VOICE:With English/Portuguese Voice,Easy to set up.