The Stanley Multi-Code 309013 receiver mounts directly to the three terminals on the door opener with terminal lugs that fit under the terminal screws. When only two terminals are present you need to use the optional 24-volt ac plug-in transformer located below.
The receiver is programmed setting the 10-position coding switches. When a Stanley Multi-Code type transmitter(s) is set to the same code it activates the receiver to trigger the door opener to activate.
Order includes programming instructions.