Apple iPod, iPhone, or iPad are registered trademarks of Apple, Inc. Products are Apple compatible and not endorsed by Apple, Inc. Compatible With Apple: iPhone 1st Gen/16GB/4GB/8GB,iPhone 3G 16GB/8GB,iPhone 3GS 16GB/32GB,iPod 1st Gen/10GB/5GB * 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.