No need keys anymore! Our smart lock is especially designed for drawers and cabinets. Fingerprint and APP unlocking, 0.5s quick response, 100 sets of fingerprints, 6 months long standby time, the fingerprint lock is safe, convenient and practical. Specifications: Color: Silver Material: Zinc Alloy and Stainless Steel Capacity: 100 Fingerprints (2 Administrators included) FAA: less than0.002% FAR: <2% Electrostatic Protection Class: more than15KV Built-in Battery: 1 * 3.7V 150mAh Lithium Battery Charging Port: Micro USB, 3.7V Charging Time: ahout 2 Hours Working Time: Approx. 180 Days (10 times of unlocking every day) Working Temperature: -20~70°C Working Humidity: 5%-95% (without Condensation) Hole Diameter: more than18mm Drawer Thickness: less than22mm Item Size: 40 * 15 * 48mm / 1.6 * 0.6 * 1.9in Head Size: 34 * 16mm / 1.3 * 0.6in (Dia. * H) Item Weight: 98g / 3.5oz Package Size: 7.6 * 6.6 * 5.2cm / 3.0 * 2.6 * 2.0in Package Weiht: 129g / 4.6oz Package List: 1 * Fingerprint Drawer Lock 1 * USB Cable 1 * User Manual