Car 3.5mm Audio Cassette Tape Adapter Transmitters for MP3 IPod CD MD iPhone Cassette adapter CD/MP3/MD-To-Cassette Converter lets you play CD, MP3 or MD players in your car's cassette deck via a direct plug into your portable audio player. It's powered by your car's own electric system so there's no need for batteries, and it produces a clean sound without the static found in most FM transmitters. Details: Allows you to play CD, MP3 or MD players through your car's cassette deck Inexpensive way to listen to your digital music through your car speakers Plugs directly into your portable player Powered by your car's electrical system Plug is an ordinary 3.5 stereo plug, suitable for most mp3s, mp4s, computers, etc