The Electric Programmer is very easy to use and it's meant for only the ARES M4A1 Carbine (Electric Fire Control System Version). There are two black knobs at the top. While facing the front the left side plugs into the M4A1 and the right side plugs into the battery you use for it. The programmer only uses Ni-MH and LiPo batteries with 2-3 Cells.

Once everything is plugged in, set the battery type according to the battery you're using. In the middle there is a switch that can select 4 different ways your AEG will fire:
SAFE - SEMI - AUTO
SAFE - SEMI - 3RDS BURST
SAFE - 3RDS BURST - AUTO
SAFE - SEMI - SEMI