2.4G Bidirectional Wireless Emit and Receiver for Audio and Video switch the signal of AV into Radio-frequency signal,then transmit wirelessly and receiver at a remote and Meanwhile,AV signal output and other equipments on the emitter and can be controled at the receiver and through remote controller.Have strong anti-disturbance and is easy to move.2.4G transmission module has been approved by FCC CLASS B in United States.With good safety,wireless is widely used.