Walkman Car Connecting Pack for MD Walkman and CD Walkman (Model# CPA-9C) The CPA-9C 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. Compatible with car cassette decks that have side tape opening Self-adjusting spring head and silent mechanism Ideal for use with Sony's MiniDisc and Discman CD players Mini-plug inserts into CD or MD player's headphone jack Works with non-Sony products