M-1A Infrared Repeater System Receiver, Cabinet Mount by
Atlas Sound. It is a repeater that allows the operation of virtually any IR-controlled A/V component from multiple room locations. The M-1A repeater's function is to receive the IR signal and rebroadcast it to the small F-1 flasher LED positioned on the front of each A/V component. The F-1 forwards the signal to the source component's IR receiver.