Fingerprint Bike Lock:Your finger is the key, do not worry about losing the key, Anti-theft, unable to copy keys. Fingerprint support 2 administrator and 20 normal users, 0.5 seconds speedily unlock. USB Rechargeable:Smart bike lock has low power consumption and long standby time. The rechargeable 110MAH lithium battery can support 6 months of standby time and can be unlocked more than 2000 times The IP65 electronic lock is resistant to water and dust. Suitable for indoor and outdoor use, such as house doors, gymnasiums, gates, warehouses, suitcases, bicycles, garages, offices, etc PVC Rubber sleeve covered steel cable and the zinc alloy lock body are designed ,strong enough to long time use Specification: Material: zinc alloy shell + stainless steel cable Fingerprint sensor: 12x12mm / 0.47 x 0.47 inch Battery type: Lithium battery 3.7V/110mAh Size:6x4.8x2.4cm / 2.36x 1.89 x 0.94 inch Package Includes: 1 x Fingerprint Bike Lock