Features: 12-button touch button with backlight, with automatic door locking and manual door locking modes. Adopts Micro USB interface of the emergency power supply, which is convenient for use with mobile phone chargers or charging device. Support any combination of 4-10 digits for the user and management codes. And the key amount is up to 10 million groups, providing you much convenience. It will automatically alarm after inputting password incorrectly for 3 times, safer and more reliable. With power supply of 3 AAA batteries, it has low power consumption. The battery life is more than one year, and the lock has automatic prompt when the power is insufficient. Suitable for wardrobes, drawers, shoe cabinets, office cabinets, newspaper boxes, metal cabinets, wooden cabinets, tool boxes, mailboxes, school lockers, etc. Specification: Power: 3 x AAA battery (not included)Power: 4.5VLow Voltage: 3.6V ± 0.2VCurrent: ≤20uA(quiescent current), 200mA(dynamic current)Working Temperature: 0-55°CWorking Humidity: 20%-80% RHLock Box Usage Time: > 20000 timesBattery Life: > 4000hLock Material: Plastic hardware combination Lock Box&Lock Catch Material: ABS plasticLock Surface Treatment: AcrylicLock Box Power Supply: 3 AAA battery(not included)Size: Lock: Approx. 95x23.5x9.5mm/3.7x0.9x0.4inLock Catch: Approx. 73x24x12mm/2.9x0.9x0.5inLock Box: Approx. 57x84x23mm/2.2x3.3x0.9inPackage List:1 x Electronic Password Lock1 x Lock Box1 x Lock Catch 1 x Pack of Screw 1 x Connection Cable