Smart Door Lock Bluetooth Digital Electronic Locks Keyless Entry Deadbol
This lock is for the door thickness is between 38mm 48mm (1.5 inches 1.88 inches). Preparation Guide for Door with Existing Holes. Battery Requirement: 4PCS AA batteries (not included). Advanced Fingerprint, IC card, Passcode, TTLock APP control, Mechanical Key. Remote Voice control with Alexa and Google Assistant (need a G2 gateway).