... ,SD, Bluetooth+Aux in Features:Car MP3 connection kits with USB,SD, Bluetooth+Aux inPerfect CD sound quality, no FM ... while the radio's buttons, support Mobile music playing while connecting with BluetoothAll in one fuction, one main console can work ... car models only set dip-switch and alternate corresponding.Compatible with:OEM Radio: VW, Audi, Skoda, Seat, BMW, Mazda, Nissan, Honda ...