Wagan FM Transmitter Full FM frequency signal between 88.1 Mhz-107.9 Mhz Internal memory holds 4 transmit channels and 4 button controls: on/off, up, down and memory Backlit LCD screen shows frequency channels with 5 second timer Backlit LCD screen shows frequency channels with 5 second timer 150 mm frequency wire for connecting MP3 and wrapping around the unit