Description: Allows you to connect an external audio source. Stream audio from your smartphone to your car stereo. Pair your phone with our Bluetooth module and select Aux from your radio. Simple installation, Plug & Play. Easy Bluetooth connection without complicated code setups. Type: 3G Bluetooth 5.0, 4 times the speed. Functionality via Bluetooth-enabled devices. No functional limitations of the car radio. Compatibility: For A3, A4 B8 B6, A6 C6 B7, C6 C5 C7, Q5, A5, A7, R7, S5, A6L, A8L, A4L. For vehicles that have the 3G system and ensure that Aux mode can be switched on in the green menu (switch media and switch aux). Installation: 1. Connect the black power cable to the 3G system. Ensure your Aux input is activated in the green menu (switch media and switch aux). 2. Connect to the CD player's socket (confirm the corresponding socket). Connect your mobile phone to the Bluetooth module, select Aux as the audio source, and you can play music from your mobile phone. Note: 1. Please confirm that your car has a music interface. It is usually located in the armrest box or storage compartment. Without this interface, you will not be able to use this product. 2. We cannot confirm 100% compatibility with the above car models and years. Please ensure the connector fits your car before ordering. Color: Black Material: Plastic Package Contents: 1 * Adapter Cable (The above package contents are included; other products are not.) Note: Light reflections and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.