Griffin iTrip Auto SmartScan FM Transmitter for iPod - Apple Store (U.S.)

Redesigned from the ground up, Griffin's popular iTrip Auto makes playing and charging your iPod or iPhone in your car easier than ever. iTrip broadcasts the music from your iPod to an open FM frequency on your car's FM stereo so you can play your tunes through your car stereo's speakers. And SmartScan makes it a snap to find the perfect frequency.