What's the best way to enjoy a portable music player while on the road? iTrip from Griffin, of course. iTrip wrote the book on FM transmitters for portable players. This version is truly universal, including an FM transmitter that sends audio to any FM receiver for listening over car stereo speakers, and a USB port to charge your player using its own charge/sync cable during use. No batteries required, iTrip gets its power through the 12V cigarette lighter/accessory port.