High fidelity audio. Anti-interference. Excellent signal. Extended stereo sound. Clear and crisp music playback. The 3.5mm jack connects to the car's AUX interface, and the USB interface connects to a USB drive for automatic music playback. Note: Not all cars with this interface are compatible. Some car AUX ports lack decoding functionality and only support MP3 playback. (Only car AUX interfaces with USB drive reading capability are compatible.) For optimal performance, ensure the USB drive doesn't contain excessive data, as car AUX ports have limited capacity. The USB drive should contain only MP3 files in the root directory, without any folders or other files. 100% Brand New & High Quality Category: 3.5mm Audio Cable Connector: 3.5mm - 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 Cord Note: Light shooting 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.