Introduction - If you have any usage issues, please Google them yourself
LED locks the basic functions are as follows 1) the use of LED displays to show the relevance of the password lock information input. (2) can be set up 4-digit code (0-9) password. (3 designated another group of 4 digits password for the " 1234 . " (4 to enter the correct password to start the relay 2 S. (5 password input error is warning sound.