Digital cabinet lock: The password consists of numbers, and each digit can be any number between 1 and 7. Mechanical keyless drawer lock: The package contains a variety of different latches, suitable for different scenarios. Cabinet mailbox lock: Touch screen password lock for cabinet mailbox file sauna drawer school locker. Battery power supply: It can be unlocked and used more than 120,000 times on a single charge. Emergency unlocking: When the battery is out of power, you can use USB power supply for emergency unlocking. The product is shipped without batteries, please bring 3 AA batteries Color: As Shown Material: Plastic+Electronic Components Package Contents: 1* Combination lock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.