Cebek DA-03 module is an electronic lock controlled by a keypad. You can insert up to 10 different codes (composed by 4 numbers in each code) which will be stored in the memory even if you loose the power supply to the module. It allows you to authorize and deny codes and has a relay output. The output could be set as momentary or timed output. The time can be adjusted between 1 and 60 sec or 1 and 60 minutes. It includes signal LED's, audible warning, keyboard and connection terminals.