High Fidelity. Anti-interference. Good Signal. Stereo Extended. Music Tone Pure and Clean. The 3.5mm plug connects to the AUX interface of the car, the USB interface connects to the U disk. Implements auto play of songs from USB flash disk. Not all cars with this interface can use this type of cable. Some car AUX interfaces lack decoding function and can only use MP3 devices. (Only car AUX interfaces with U disk reading capability can use this type of cable.) When using, it is recommended not to store too many files on the U disk, as car AUX systems may have capacity limitations. The U disk should not contain other documents or folders. MP3 format songs are recommended. 100% New & High Quality Category: D3.5 Audio Cable Connector: D3.5mm to USB Length: 21cm Color: Black Material: Plastic + Metal Package Includes: 1 x 3.5mm AUX Audio Plug Jack to USB 2.0 Male Converter Cable Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3cm.