VEVOR Fingerprint Door Lock Set, Electronic Biometric Knob Keyless Entry Door Lock with Handle, Auto Locking, One-Time Code, Anti-Peeking Password, Easy Installation, for Home, Apartment, Matte Black
The USB-C port on the outer handle is for emergency power. When the battery is dead, a power bank can be used to provide temporary power through the USB-C port to unlock the lock.
