Description : What does a fm transmitter mp3 usb do exactly?
Last Answer : An fm transmitter mp3 usb allows you to play your digital music in your car. You do not have to listen to the music on the radio but you can put songs on the transmitter so that songs on ... car. Go to http://www.Amazon.com/Car-MP3-Transmitter-Drive-Remote/dp/B000O3PLYS for examples of transmitters.