7 LED Preset Indicators for FM Frequencies,7 FM Modulator presets that a local radio station is not broadcasting on (87.7 87.9 88.1 88.3 88.5 88.7 88.9MHz)

Channel Button Pressing this button will change the frequency that the FM Transmitter roadcasts on.

USB EXT Power 5V Connect to mp3, charge to mp3.

3.5mm Stereo Input Jack Use this jack to connect various audio devices to the FM Transmitter via the headphone jack of any Mp3 player,DVD player,or CD player.

12 Volt DC Adaptor End Insert the 12 Volt DC Adaptor End into the vehicle's 12 Volt power outlet to supply power to the unit.

Audio Cable with 3.5mm and 3.5mm Plugs Use this cable to connect various audio devices to the FM Transmitter.