Compatibility --- This bluetooth module adapter is suitable for Mercedes A B C CLK GL M R Class W169 W245 W203 W209 W164, etc. Accurate and convenient to meet your needs, it is the best companion on your journey, giving you the best music enjoyment | Easy to use --- Support Bluetooth 5.0 system, compatible with other 2.0 3.0 4.0 Bluetooth system versions. Pair your phone or tablet with the Bluetooth module, select Aux in the radio, and you can use your phone to play music through the car stereo. You can listen to music from your phone/pad/mp3 (with bluetooth function), which is convenient and practical. | Stereo music --- The bluetooth adapter cable allows you to quickly and easily control audio, radio, stereo and other functions from your phone or any bluetooth compatible device. Will give you clear stereo music with high definition, fast transmission and low distortion. Give you the best music enjoyment | High-quality materials --- The Bluetooth AUX Adapter is made of high quality ABS and metal material, durable and precision machined to ensure durability. Connect the car audio through the wiring harness, without interference, without loss of sound quality, giving you a pleasant experience. | Plug and Play --- Our Bluetooth module adapter is easy to install, just plug the connector into the socket of the radio, the red wire is connected to ACC12V+, the black wire is connected to GND 12V‑, plug and play, support non-destructive installation