Importer520 Car Audio Cassette Tape Adapter for iPod/Sony MP3 CD Brand New Bulk Package Silent mechanism reduces mechanical noise on the road. Spring-loaded cassette head helps maintain contact with cassette player's head for clear sound. Now whether you are going down the block or cross-country, you will have plenty of music for the whole trip with this adapter. Connect your CD Player/MiniDisk Player/iPod to your car stereo through your car's in-dash cassette player. Cassette-shaped Interface inserts into your car's tape deck. Mini-plug inserts into your iPod/CD Player/MiniDisk Player headphone jack. Suggested Applications: iPhone 3Gs 16GB/32GB decks that make you insert the cassette with the tape opening facing the side/Apple iPhone 4 16GB/32GB.