RCA Car Cassette Adapter for MP3, iPod, Mini-Disc, Discman or CD Player The cassette adapter is ideal for listening to your CD or MP3 player through your car's in-dash cassette player Plug the jack into your player and the cassette tape into your car's cassette deck to start enjoying your tunes while your drive Compatible with decks that make you insert the cassette with the tape opening facing the side Mini-plug inserts into your portable MP3 or CD player's headphone jack Silent mechanism reduces mechanical noise on the road. Self-adjusting spring-loaded head maintains optimum contact with your cassette deck's tape head