Philips USA PH-62050 CD/MP3/MD-To-Cassette Adapter (Discontinued by Manufacturer) 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 If you have auto-reverse on your cassette player and there is no way to disable it, this product will not work. There is a warning on the back of the package that says you have to disable auto-reverse.