Our external USB CD player decoder is designed for cars that do not support playing WAV audio files. This dedicated audio conversion kit works with Aux connections, ensuring compatibility without concerns about car system limitations. If the connection does not display audio tracks, your car may not support music files in WAV format; connecting our auxiliary audio decoder allows you to play CD music. For AUX connection, verify that your car has an AUX input; note that CD tracks will not appear on the car radio screen. For FM connection, enable the FM function and use the remote's "Mode" button to match the frequency on the corresponding interface. Color: black Material: plastic Due to different production batches, variations in product appearance and printed text may occur; these do not affect functionality. Package Contents: 1 x CD Player Decoder Kit The package includes only the items listed above; other products are not included. Note: Lighting reflections and screen display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.