Our external USB CD player decoder for cars which don't support playing WAV audio files. Dedicated audio conversion kit for Aux connections, you don't need to worry about your car not being to use it. If the connection does not show audio tracks, your car does not support music files in MAV format,you can connect our configured auxiliary audio decoder to play your CD music. For an AUX connection, check if your car has an AUX input; note that CD tracks 't show on the car radio screen. For FM connection, turn on the FM function and the "Mode" button on the remote to adjust to the same frequency on the corresponding interface. Colour:black Material:plastic Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 x CD Player Decoder Kit Only the above package content, other products are not included. Note: Light reflection 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.