Features: 1Fingerprint lock adopts highquality zinc alloy material with good durability and stability. 2The fingerprint collector uses a semiconductor living fingerprint sensor with high security. 3Fast fingerprint recognition speed simple operation and the lock can be quickly unlocked by pressing the fingerprint lightly. 4With USB charging interface builtin 3.7V rechargeable lithium battery can be charged via data cable and power bank. 5After each unlock the pass rate will be continuously improved through fingerprint stitching and image recognition learning algorithms. Specification: Item Type: LockMaterial: Zinc AlloyBattery Type: 3.7V Lithium BatteryBattery Model: 402025Nominal Battery Capacity: 150mAhNumber of Fingerprints Can be Stored: 20Rejection Rate: <2%Application: Cabinet Doors Drawers etc.Weight: Approx. 184g / 6.5ozSize: Approx. 4x4x5cm / 1.6x1.6x2.0in Package List: 1 x Lock1 x For Android Data Line6 x Screw1 x Aluminium Alloy Accessory1 x Manual Note: 1.Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.