SW Car Tape Audio Cassette Adaptor 3.5mm AUX Cable for iPhone iPod MP3 US Connect your CD Player / MiniDisk Player / iPod to your car stereo through your car's in-dash cassette player Mini-plug inserts into your iPod / CD Player / MiniDisk Player headphone jack Spring-loaded cassette head helps to maintain contact with cassette player's head for clear sound Cassette-shaped interface inserts into your car's tape deck Silent mechanism reduces mechanical noise on the road