iriver AFT 100 Mobile FM Transmitter Mobile FM transmitter for listening to portable audio devices through your car stereo Transmits to all FM frequencies (88.1 to 107.9 MHz) Plugs into standard car power socket--no batteries required Connects to the headphone jack of portable MP3 or CD players; easy-to-read blue LCD display Universal accessory for all digital audio players compatible with a 3.5-mm mini-jack