Griffin iTrip Auto Universal Plus FM Transmitter for Portable MP3 Players-2010 Packaging Compatible With Any Portable Audio Device With A 3.5Mm Headphone Jack Charges Any Portable Device With A Usb Port Built-In Antenna Powered By 12V Power Outlet FM Stereo Modulation Listen to your MP3 or other portable player on your car stereo 12V power plug works with any cigarette lighter socket Simple 3-step setup Lighted display is easy to read Built-in USB port lets you charge your player using your own charging cable