WHAT IT IS FOR - Designed for BMW's with original or aftermarket USB or AUX-IN systems. Allowing you to effortlessly read, display and control your smart phone music library wirelessly via your car display. Advanced wireless music technology powered by high quality wireless tooth technology enables it to flawlessly communicate with your phone. This allows for a much more enjoyable in-car music experience as you can simply get in and drive, without the risk of leaving your Phone in the car. ADVANTAGES - Additional functionality includes: 1. streaming audio from your phone through the car stereo system via A2DP Bluetooth. 2. Support playing U-disk music and charging smart phone, simply press the button to change modes between USB mode and Bluetooth mode. no installation required, simply plug into your USB / aux-in system. Function Keys, mode button, press the Bluetooth mode, press again to U disk Mode. COMPATIBILITY Keple Bluetooth Music Adapter 4.0 is compatible with BMW X1 X3 X5 X6 Z4 (2007 - 2016), BMW 1 ,3, 5, 6, 7 Series(2004 - 2016), Mini Cooper R55, R56, R57(2006 - 2013). Can be used with Bluetooth phones, tablets, music players like: iPod, iPhone, Samsung Galaxy, HTC, LG, Huawei, Sony, Motorola, OnePlus, Xiaomi, Alcatel, ZTE, Vodafone ect. DESIGN Keple bluetooth device is V4.0 with build-in microphone and LED indicator. It is made to be easy to operate. Universal vehicle adapter has built-in noise reduction circuit, high quality clear sound and no noise. Allowing you to effortlessly read, display your phone / tablet music library wirelessly via your car display. Advanced wireless music technology powered by high quality wireless tooth technology enables it to flawlessly communicate with cell phone and tablet. WARRANTY Our great customer service is available for any questions before or after the purchase.