Need a break from the monotony of the same twelve songs playing on the radio Hook up your MP3 player or plug a musically-charged Micro SD card into this FM transmitter and fill your car with the sounds of your favorite music. This high-quality combination MP3 Player and FM transmitter plugs into your car's cigarette lighter DC port and broadcasts over a user-set FM frequency, turning you into the DJ of your own radio station. Only this radio station doesn't have any annoyingly unfunny commercials about the local car dealership. It's a double win!