... solutions Control Digital Music Changer from your car radio buttons or steering wheel controls Support ... audio sources, like PC, MD, PSP, GPS Navigation and Mobile Phone Easy to install and use,without changing the car ... accessores:usb extend cable, 3.5 line audio cable,usb reader,user manual: Installation Guide: ... between MP3 and Aux in.Install illustration: car audio usb interface CE,FCC,RoHS approved