EX1 USB Cable AUX Adapter for BMW 3 Series 5 Series Z Series X5 X6 E87 E90 E91 E92 E87lci E88 E89 E93 F10 F11 F18 F12 F13 F01 F02 F03 F25 Listen music in the USB disk via the car stereo without the loss of sound quality. The cable is for music transmission and charging. Insert the green connector to the back of the car stereo (see photo) and insert the USB stick into the cable for music. Compatible models: E87LCI/E88/E90/E90LCI/E91/E91LCI/E92/E92LCI/E93/E93LCI/F07GT/F10/F11/F18/F12/F13/F01/F02/F03/F04HYB/F25/X5E70LCI/X6E71/X6E72/Z4/E89 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.