INSTEN 3.5mm Universal Car Audio Cassette Adapter for Smartphones, 3-Feet Cord (Black) Now whether you are going down the block or cross-country, you will have plenty of music for the whole trip with this car audio cassette adapter. Connect your phone to your car stereo through your cars in-dash cassette player. Mini-plug inserts into your Smartphone/MP3 Player/CD Player/Mini Disk Player headphone jack. Cassette-shaped Interface inserts into your cars tape deck. Mini-plug inserts into your phone's headphone jack. Silent mechanism reduces mechanical noise on the road. Spring-loaded cassette head helps maintain contact with cassette players head for clear sound. 40-Inch cord so you can rest your Player where you want it. Adapter: 3.5mm audio adapter. Note 1.) A: If there is unusual noise clatter from the cassette adapter while in play, press the pause button to reduce the sound clamor; B: If the volume is very low, or the music come only from one side of speakers, press the DIR button (if available) Note 2.) If the adapter is ejected undesirably/ not working, since it is unidirectional, keep the side with the words Cassette Adapter facing up (In the rare case of an upside-down player system, insert it facing down)