Auxiliary Black Retractable Cable Cord for All MP3 iPod iPhone Samsung Cell Phones Car Stereos 3.5MM The innovative retractable design cuts down on travel bulk. And contain a unique ABEL cable tie. 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