Fm Transmitter+car Charger for Iphone 3gs 3g 4s 4 Ipod Touch New Universal All-in-1 FM Transmitter Using the iPhone, you can talk to anyone hands-free style through your car's speaker system If you want to listen to digital music simply place your iPod or MP3 player onto the holder, tune to any FM88.1 - 107.9 MHz station and enjoy crisp, clear audio