Type: 3G Bluetooth 5.0, 4-speed function via Bluetooth-enabled devices No functional limitations of the car radio Allows connection of an external audio source Pair your smartphone with the car stereo via Bluetooth module and Aux input Easy installation, plug and play Connect via Bluetooth without complicated code or wiring Specifications: Type: Bluetooth adapter Material: ABS Color: Black Compatibility: For A3, A4 B8, B6, A6 B7, C5, C7, Q5, A5, A7, R8, S5, A6L, A8L, A4L (Please verify connector compatibility with your vehicle before purchase) Installation: 1. Connect the black power cable to the 3G system. Ensure the Aux input is enabled (switch to "Media" and "Aux"). 2. Plug into the CD changer socket (confirm correct fit), then pair your mobile phone with the Bluetooth module. Use Aux input to play audio from your phone. Package includes: 1 x Bluetooth module 4 x Installation tools Note: Confirm your vehicle has a music interface, typically located in the armrest box or storage compartment. Without this interface, the product will not function. Compatibility with the listed vehicle models is not guaranteed for all model years. Verify connector fit before ordering. Stereo removal may be required for installation. Content limited to items listed; other accessories not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement tolerance: ±1–3 cm.