■Face and Fingerprint Smart Door Lock
■Unlocking Method: APP, Face, FP, Card, Password, Alexa, Google Features: Face Camera Doorbell, HD Display, Voice Prompt
■Face-50, FP-100, Card-100, Password-100
■Emergency Power Unlock Feature By USB Power Source
■Power 4200mAh Lithium Battery, USB Emergency Port
■Suitable For 35-50mm Door Thickness