This product is specially made for car audio/stereo.<br> Just connect the power to the battery and plug the two RCA into the car radio,connect your phone with bluetooth.<br> You can just Insert this item to the back radio then Connect the red wire to 12V+, the black wire to 12V-.<br> Choose AUX from your radio and you can play music from your phone in your car.<br> Match your phone or pad to bluetooth module.and Choose Aux from your radio, then you can use your phone to play music through car speakers;You can hear music from your phone/pad/mp3(They should have blueooth function).<br> Special Features:<br> Plug & Play<br> 2 RCA Stecker<br> Bluetooth: V5.0<br> Range: 10m<br> Set up with auto-pairing in a minute<br> Existing CD changer can still be used<br> Function via Bluetooth-enabled devices<br> Fits to following all vehicles with RCA input on the Radio<br> Suitable for most cars<br> Colour:black<br> Material:ABS<br> Package Contents:<br> 1x Bluetooth Adapter Cable<br> Installation info:<br> 1. Connect red wire to 12 volt ignition power<br> 2. Connect black wire to ground/metal chassis<br> 3. Connect rca to rca inputs of the source device<br> 4. Go to phone and pair it<br> 5. Ready to go<br> Only the above package content, other products are not included.<br> Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.