Eximtrade USB Interface Cable for Volkswagen RCD300 RCD310+ RCD510 RNS315 Listen the music files in the USB stick via the Volkswagen stereo without the loss of sound quality. The cable is for music transmission and charging. The length of the cable is 90cm. Insert the yellow connector on the back of the car stereo (see photo) and insert the USB stick into the cable for music. Compatible with RCD510/RCD310+/RCD300/RNS315. You have to activate the AUX function to use this product. Please note that not all car stereos have the AUX function, we suggest you to check before buying the product.