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.Work for /for /for 5 5C 5S 6 6 plus,for ,for ,for ,for and any other phones or pads(Pls make there is bluetooth function in your phone or pad) Bluetooth 4.0 system,and with other versions of 2.0 3.0 4.0 Bluetooth system,support commonly used MP3 audio,but also support WMA WAV FLAC,and other high-quality audio decoding,non-ordinary Bluetooth functions,can support DSD capacity transmission.Easy to install Red cable connected to 12V + ,Black cable connected to 12V-,12Pin plug into the CD player (please confirm corresponding socket),mobile phone is connected with the Bluetooth module,aux audio source ,you can play mobile phone music. Colour:Black material:plastic Package Contents: 1* bluetooth adapter 2* U-tool Only the above package content, other products are not included. Note: Light 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.