Myron & Davis ANT-108 4-Channel Wireless FM Modulator

Takes an audio signal (via RCA cables) and broadcasts it wirelessly over a specific FM radio frequency so you can play auxiliary audio through your car speakers. Features 4 selectable FM frequencies so you can switch channels to avoid local radio station interference. Equipped with standard RCA input jacks (red and white) for audio, plus power and ground wires for vehicle electrical integration.