Function via Bluetooth-enabled devices,No functional limitations of the car radio,Allows you to connect an external audio source,It is possible from your smartphone to your car stereo to stream,Pair your phone with our bluetooth module,and choose Aux from your radio. You can enjoy music from your phone through car speakers.Work for /for iPad/for 5 5C 5S 6 6 plus,for ,for ,for ,for and any other phones or pads(Pls make sure there is bluetooth function in your phone or pad) Bluetooth 4.0 system,and compatible with other versions of 2.0 3.0 4.0 Bluetooth system,support commonly used MP3 format audio,but also support WMA WAV FLAC,and other high-quality audio format decoding,non-ordinary Bluetooth functions,can support DSD large capacity transmission.Easy to install Red power cable connected to 12V + ,Black power cable connected to 12V-,12Pin plug into the CD player Jack(please confirm corresponding socket),mobile phone is connected with the Bluetooth module,aux audio source selection,you can play mobile phone music. Colour:Black material:plastic Package Contents: 2x bluetooth adapter 4x U-tool Only the above package content, other products are not included. Note: Light 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.