Griffin's iTrip Universal FM Transmitter and Charger has a cool, rechargeable design that plays well with others. It's compatible with any audio source that uses a 3.5-mm headphone jack, including iPod, Sansa, Zune, portable CD players, and more. No more replacing batteries. Recharge iTrip Universal's internal battery in any USB port and then connect to your player with the included stereo audio cable. Three user-programmable presets save the best frequencies so you can access them quickly later. Select stereo or mono output. Wherever you go, iTrip Universal is the perfect partner for your portable audio.