Pops right into your car's cassette deck to play music from your iPod, iPhone, iPad, Android device or Windows Mobile device. Four directions to adjust the wire conveniently. Convenient 2.9-Feet cord keeps your player within easy reach. Lightweight, portable design stores easily when not in use. Improved cassette head mechanism for improved sound quality. Dual Balanced conductors delivers more natural audio. Spring-loaded cassette head maintains solid contact with your cassette tape player's head for clear sound Some cassette deckers may eject the adapter, don't worry, just unscrew the top side and remove the three gears on the upper left (Refer to photo 7) and it will work. (Just a few cassette decker will eject the adapter)