Take Your Tunes on the Road. Listen to MP3s. Play music stored on your MP3 player through your car’s FM tuner. It’s simple using this lightweight transmitter with an easy-to-read display. Easy to Use. Just plug into your player’s headphone jack and you’re ready to go. The transmitter comes with a 12-volt car adapter to keep TuneCast Universal powered while you drive. An adhesive-backed bracket makes for easy mounting to your car’s dashboard. Compatible with the following iPod or iPhone models: Compatible with all iPod / iPhone models.