I have in my possession a short 4" cable that has molded on one end a USB male and on the other end what seems to be a 3.5mm female jack. What in the heck is this used for? I'm not ready to just plug it in any USB port and plug in a set of headphones. Nor have I had the chance to ohm it out to get a pin-out. It's white with nothing else molded on it except for the standard USB symbol.