Griffin RoadTrip FM Transmitter for iPhone and iPod (Black) for $29.95

The all-in-one automobile solution for iPhone and iPod. Plug RoadTrip into your car's cigarette lighter or 12-volt accessory socket. Plug your iPod into RoadTrip's cradle (adapters are included for nearly every iPod model). RoadTrip's FM transmitter sends the music from your iPod to your car's FM radio, so the whole car can enjoy it through your stereo speakers.