Note size: The combination lock is suitable for cabinet thickness of 0.5~12mm, and the mounting hole can be 19 x 15.8mm.Target group: The touch keyboard lock is very convenient for people who always forget to retrieve the keys, and the password lock can solve this problem.Widely used: This combination lock is an ideal choice for toolboxes, cabinets, drawers, mailboxes, school lockers or any place where keys are not suitable.Installation: This combination lock is very easy to install and does not require screws; the lock can be set to a combination of 1 to 15 digits.Material: This combination lock is made of high-quality zinc alloy material to ensure firmness, accuracy and safety.Turn left to unlock, turn right to unlock, turn left to unlock, turn right to unlockMaterial: Zinc AlloyTouch screen: tempered glassThe middle screw pattern length L is 20mm (2032 button battery for locking)Usually L20 is suitable for metal cabinets and thin wood cabinets (thickness 0.5-12mm)Password management: user password and administrator password can be changed on the lockA red light will appear when the battery is low, and the battery can be directly replaced when the battery is completely empty, so you can use it without any worries.The lock is in a fixed password mode at home, so there is no need to change the mode at home. It can open the public password mode for mobile users such as gymnasiums, swimming clubs, golf clubs and laundry rooms.Material: Zinc AlloyBattery: 3V button battery (CR2032) (not included)Dimensions: 56 x 56 x 50mm / 2.20 x 2.20 x 1.97 inches (approximately)USB key interface function: USB key interface is an emergency power supply. When you need to unlock the lock and don't have time to buy the battery, you can plug in the Android charger to connect to the power source and enter the password to open the lock, but you can't plug it in for a long time. The lock does not have a charging function.The length of the combination lock shaft is 20mm / 0.79