Griffin Technology iTrip Auto Universal Plus FM Transmitter (EFIGSN)

Works with audio devices featuring 3.5mm jack Built-in USB socket to charge your portable players Smart Scan searches for three clearest frequencies User selectable stereo/mono output Easy-to-read backlit display

We call this particular one "auto" because it gets its power from your vehicle's 12 volt accessory outlet or cigarette lighter. And we call it "universal" because it works with almost any portable audio device that has a standard 1/8" headphone jack (whether CD, MP3, cassette, or, yes, iPod). And the "Plus" in the name of this iTrip model refers to its ability to charge a portable player by means of a built-in USB port. (Check your player's documentation for charging capability.) Plug in your player's USB charging cable. Not only do you get to listen to your tunes while you're traveling, you arrive with a fully-charged player.