iSimple ISFM22 TranzIt Universal Bluetooth Enabled FM Transmitter Car Kit for iPhone or iPod, Blue Discontinued by manufacturer and replaced with the ISFM23 (ASIN B00DHQ6K7Q) Static free audio streaming using wireless Bluetooth connection to car's audio system, for best possible music enjoyment Clean installation with no visible wires for a clean factory looking appearance Unit auto reconnects when entering the vehicle for maximum ease of use Provides 4 selectable FM broadcast frequencies for the best connection possible