The RX-77 works in combination with RC9500 or RC5400 and is able to receive their RF signal and then convert it to an IR signal that can be received by Audio / AV equipment.The RX-77 can flash IR signals by itself, or can be connected directly to the IR sensor of the Audio / AVcomponent via the included IR Emitter. ID setting and RF channel setting allow multiple use of the RC9500/5400 and RX-77 without having any confliction between the systems.