Skque white Cassette Tape Adapter- Transfer sound from mp3 player to car stereo Connect your MP3 player 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 MP3 player's headphone jack Spring-loaded cassette head helps maintain contact with cassette player's head for clean sound Easy and convenient to use,light and easy to carry