Smart Fingerprint Door Lock Keyless Entry Door Lock, Biometric Door Lock Fingerprint Door Knob with App Control for Home Hotel Office Apartment Bedroom (Black, 1 Pcs)
- ... Tips For Smart Door Locks: the smart entry door lock is only suitable for wooden and steel doors with a thickness of 35 mm to 54 mm, it requires 4 AAA batteries for installation and the power can be applied for about 9 months.
- There is also a low battery indicator and a USB interface for emergency power supply, but be careful not to charge the battery, please replace the battery in time if the battery is dead.