Features: 1.With password error alarm function, enter the wrong password four times in succession, the keyboard will be locked for 60 seconds and activate the alarm. 2.With password memory function, the original password will remain after power off and battery changing. 3.With password confusion function, enter random numbers before or after the correct password to prevent others from peeking. 4.Adopts digital touch screen and number keyboard to enter the password, more convenitn to use. 5.Great electronic lock for agents, schools, spas/saunas, swimming pools, gyms, golf courses, supermarkets, hotels, companies, factories and families. 6.Designed with USB port for emergency charging unlock. 7.Made of high strength ABS material for maximum durability. Specification: Item Type: Electronic Combination Lock_x000D_ Material: ABS _x000D_ Color: Black_x000D_ Optionla Size: L=20mm / 0.8in, L=30mm / 1.2in_x000D_ Power Supply: 1 x 3V CR2032 Button Battery (Not Included) _x000D_ PackageList: 1 x Electronic Combination Cabinet Lock1 x Installation Accessory Pack1 x Manual