Features: 1) This product is required to modify the code. This item is only suitable for CIC units cd host . 2) If other Harman, BNT, NBT EVO, cd hosts want to use this USB cable, they must cut off the buckle on one side of the USB cable, push the unlock part, turn the plug over and insert it, so that it can be used (mainly the line must be reversed to use). (1) the interface is the uniform standard size and the interface is 4 pins (2) Generally installed in the glove box of the main officer (miscellaneous). The original car comes with a direct replacement. Please find your own place and fill it without any. (3) After installation to achieve the function of reading U disk, to install a USB cable, connect to the back of the cd host, some cd or the navigation machine may also go to brush machine (brush hidden function), on the brush hidden function, If you want to DIY, you can search in the internet if you do not want to DIY, please move the technical repair shop and modified shop.