High Fidelity. Anti-interference. Good Signal. Stereo Extended. Music Tone Pure and Clean. The 3 plug of hook up with the AUX interface of the car , the USB interface connect with the U disk. Implement auto plays of USB flash disk. Not all of the vehicle with this interface can use the sort of line. Some automobile AUX without interpreting function, so can completely use MP3 device, (only vehicle AUX interface have the operate of read U disk can use this sort of line) When using, U disk had larger now not shop too much?£?? particular to the auto AUX can help how loads means disk can not produce other office work inside and don't set up folder. of MP3 structure is used. & High Quality Category: D3 cable Connector: D3 Length: 21cm Color: Black Material: plastic + metal Package Includes: 1 x three AUX Audio Plug to USB 2 male Converter Cable Cord Note:Light and various displays can cause the color of the article in the photo just a little diversified from the real thing. The dimension allowed error is +/- 1-3cm.