Description: Wide Application: perfectly used for doors, cabinets, bikes, storage lockers, etc. Fingerprint is Password: easy to operate, no need any tools , you can add or delete fingerprints easily by following the instructions of the user manual. 1000 Groups of Fingerprints: the U lock supports up to 1000 fingerprints recording USB Rechargeable: built-in a 450mAh lithium battery, support up to 5-months standby time and can be opened 5000 times. Superior Strength & Durability: The lock body is made of aluminum alloy and the lock beam is made of stainless steel to protect your cabinet or your home against thieves. Waterproof IP67, 360 Capacitive fingerprint recognition, 4.0 for Andoird/ iOS system. Switch lock function: fingerprint/ unlock, fingerprint management: fingerprint management through APP (add, delete, calibration, etc.) You can unlock the key remotely Specification: Material: Aluminum Alloy + Stainless Steel Fingerprint: 1000 groups Battery: built-in a 5V 450mAh lithium battery Charging Method: Micro USB, 5V Waterproof Grade: IP65 : 4.0/2.4GHz connection distance: 6 meters in radius Pressing times:1000000 times Work temperature:-10-55 Storage temperature:-20-65 Package Includes: 1 x Fingerprint U lock 1 x USB Cable Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!