Function via Bluetooth-enabled devices No functional limitations of the car radio Allows you to an external audio source It is possible from your smartphone to your car stereo to Pair your phone with our bluetooth module,and Aux from your radio. You can enjoy music from your phone through car speakers. You can just Insert this item to the back radio then the red wire to 12V+, the black wire to 12V-. Match your phone or pad mp3 to bluetooth module.and Aux from your radio, then you can your phone to play music through car speakers. Installation: Red cable connected to 12V+ Black cable connected to 12V- plug into the CD player Product s: Name: Car Audio Bluetooth Adapter bluetooth version: 5.0 Voltage: 5-12V Cable length: approx. 27CM Universal, suitable of vehicle. Colour:black Material:plastic Package Contents: 1x Audio bluetooth adapter Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. ean/sku：6902903058109