... Bluetooth handfree kit Features:Car Digital CD Chagner with USB. SD adapter 1. Auxiliary interface adapter for MP3 player/iPod 2. Perfect CD ... sound quality, no FM noisy. 3. 16GB USB flash and SD card ... car models only set dip-switch and alternate corresponding. Works with: OEM Radio: VW, Audi, Skoda, Seat, BMW, Mazda, Nissan, ...