This auction is for a sony unilink cable THAT WAS CUT IN HALF. The reason I cut it in half was cause I used the other end to make the GNUnilink circuit (http://gnunilink.sourceforge.net) to hookup to my car computer (mp3car.com). You can make this circuit as well, and it only costs about 5 bucks but lets you display whatever you want on your sony head unit AND enable the auxilary input on the back (the unit to do that normally costs ~30 bucks)..