Auxiliary Retractable Cable Cord for All MP3 iPod iPhone Samsung Cell Phones Car Stereos 3.5MM White The innovative retractable design cuts down on travel bulk Pull from both ends to extend the cable to desired length Connect one end of the cable into the 3.5mm mini-stereo jack of your car stereo, home stereo, portable speakers, or sound card Connect the other end of the cable into the 3.5mm mini-stereo jack of your iPod, iPhone, MP3 player, or other audio source When not in use, retract to conveniently toss into your pocket