Digital Music Cd Changer for 17pin BMW 3 5 7 Series E36 E46 E39 E38 /K1200LT 1997-2004 Becker Business 2000/BMW Z8 2001-2002 Business CD Radio HUAHEE Yatour digital musci changer is a replacement of CD changer. It can be easily installed and used. Not change car original function . With Usb Sd Aux interface.Support play songs from SD/SDHC/MMC card, USB stick ,Aux device . Bluetooth adapter is optional . It can make travel more entertaining and increase. Please confirm your car can be installed before ordering , if you are not sure , please contact us .