1、High quality metal panel, with backlight keypad, which has delicate and stylish appearance. 2、The card is set on the lock, no system software is needed, up to 1 management card and 200 door opening cards can be set. 3、Press the button for 5 times continuously, the door lock will return to the factory state: management password: 12345678, the default household mode, single mode to open the lock. 4、The password can be modified by yourself, up to 1 management password, 200 door opening password. 5、When the door lock is in factory state, the first swiping card is added as the management card. 6、This system supports messy code opening door, you can increase the number before and after the password (the password shall not exceed 32 digits at most). 7、Powered by 4pcs AA battery, and can be connected with external emergenc power supply, convenient for using.