I-trip

The iTrip is an FM Transmitter made by Griffin Technology as a third party accessory for Apple Computer's popular iPod.

The iTrip plugs into the headphone socket of the iPod and converts the audio output into an FM radio signal, which can then be picked up by appliances such as car radios. It has a range of about fifteen feet, and can broadcast on any FM frequency from 76.0 to 108.0 MHz (though the default US configuration is limited to 87.9 to 107.9 MHz).

Instead of using batteries, the iTrip draws its power from the iPod through the remote control port located just next to the headphone socket.