The listing, Retractable cord for MP3 or IPOD radio has ended.
This is a new cord, never used but not in packaging.
I copied this part from the website for these. :)
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