Car MP3 connection kits with USB,SD, Bluetooth+Aux in Features:Car MP3 connection kits with USB,SD, Bluetooth+Aux ... buttons, support Mobile music playing while connecting with Bluetooth All in one fuction, one main console can work with defferent car ... only set dip-switch and alternate corresponding. Compatible with: OEM Radio: VW, Audi, Skoda, Seat, BMW, Mazda, Nissan, Honda, Toyota etcAftermarket ...