Features1. Made of aluminum alloy, strong and durable.2. This is a smart fingerprint lock, which can be unlocked only by fingerprint, and it is easy to use without a key.3. It is very suitable for housing rooms, gates, factory workshops, offices, bicycle electric vehicles, cabinet doors, backpacks, suitcases, file cabinets, student dormitories, staff lounges, hospital ward toolboxes, food delivery boxes, logistics express delivery truck. Specifications:Capacity: 110mAhInput: DC5V / 200mAWorking Voltage: 3- 4.2 VSize: 2.3 x 2.3 x 7 cm Package Included:1 x Fingerprint1 x Charging Cable USB1 x User Manual