The Scosche TRUESHIFT universal digital FM Transmitter is perfect for streaming music and other audio files directly from the 3.5mm output on your device when using a 3.5mm AUX audio cable. The 5-Watt USB car charger plugs into any vehicles 12V port. Use the car charger to power the FM Transmitter and charge/power your device with the included USB port all at the same time. The convenient design of the LCD display provides an easy to read interface which can be adjusted and viewed from different angles with the patented gear-shift design. It?s easy to sync; just find an unused FM frequency on your vehicles stereo and match the same frequency on the FM Transmitter. Up to 100 digital channels to choose from ensures a crisp clear streaming signal to your vehicles stereo system. The Scosche TRUESHIFT universal digital FM Transmitter is compatible with your iPhone iPod Android MP3 Player or any other mobile device with a 3.5mm AUX output port. Perfect for use in your vehicle for every day music listening or while taking a long road trip!