... buttons Works also with steering wheel controls Support USB Disk and SD Card Building in high quality ... PC, MD, PSP, GPS Navigation and Mobile Phone Easy to install and use. DMC advantages: 1. CD sound ... quality, no FM transmitter noisy. 2. support USB, SD card, 3.5mm jack input. 3. All- ... full accessores:usb extend cable, 3.5 line audio cable,usb reader,tool for V.W: Car USB/SD/AUX adapter