Connect your CD Player/MiniDisk Player/iPod to your car stereo through your car's in-dash cassette player Compatible with decks with the tape opening facing the side Cassette-shaped interface inserts into your car's tape deck Mini-plug inserts into your iPod CD player MiniDisk player headphone jack Silent mechanism reduces mechanical noise on the road Spring-loaded cassette head helps maintain contact with cassette player's head for clear sound 40-inch cord so you can rest your player/iPod where you want it