[BLUETOOTH MUSIC STREAMING FOR CAR] Bletooth 5.0 adapter for 2010-2019 year Audi MMI 3G, 3G+ and 2005-2011 Year Mercedes. NOT compatible for 2004-2009 year Audi MMI 2G. [UPGRADE BT 5.0 FOR BETTER SOUND QUALITY] Use expensive Qualcomm CSR8675 chip for better sound quality experience.Support 24Bit audio processing and 120MHz DSP, support APTX, APTX-LL, APTX-HD high-quality transmission format. [PLUG, PAIR and PLAY] Insert the adapter into the 30 Pin connector and connect to our Bluetooth with your mobile phone to play music. The setup is very simple. Our adapter only has Bluetooth music streaming and does not support phone calls, But you can solve this problem by connecting the adapter's Bluetooth and the car's Bluetooth phone to your mobile phone at the same time.