I am selling a Jensen MediaLink 4, this i what you need if you have a jensen or phase linear(circuit city brand) headunit and want to plug in your ipod (interface it will be controlled from the headunit not the ipod) use a USB drive to listen to your music, connect a av plug, or connect aux input, plesae check to make sure this fits your headunit, I bought it for my sisers car and her headunit does not support it so now i have this thing lying around. All i am asking is 30 bucks plus shipping thats how much i payed for it, thanks