Invisible fingerprint, easy and convenient to use, and can prevent theft at the same time. USB emergency interface, when the battery is exhausted, users can unlock it with an external battery. The ergonomic handle, take full account of the handle, adjust the hand. Each fingerprint lock is equipped with 2 mechanical keys, which will allow users to unlock using the traditional method. Semiconductor, intelligent and sensitive fingerprint with 360 arbitrary angle recognition. Product description Color: Black Description: Intelligent and sensitive semiconductor fingerprint with 360 arbitrary angle recognition. Each fingerprint lock is equipped with 2 mechanical keys, which will allow users to unlock using the traditional method. USB emergency interface, when the battery is exhausted, users can unlock with an external load from the power bank. Invisible fingerprint, easy and convenient to use, and can prevent theft at the same time. Specification: Color: black, gold Material: stainless steel Battery: built-in rechargeable battery Lifespan: 100,000 times Scan time: