Tune-Free Audio FM Transmitter for all iPod&rsquo;s, MP3 Portable, CD, and More Allows you to listen to your portable audio device through your car or home stereo system. For use with all iPods, CD, MP3 Portable DVD Players Laptops, and Cassette Players Listen to your music on the road or anywhere No software to install, Just Plug into your Car or into your Stereo Requires 2 AAA batteries (not included)