High Fidelity. Anti-interference. Good Signal.Stereo Extended. Music Tone Pure and Clean.The 3.5 plug of the connect to the AUX interface of the car , the USB interface connect to the U disk. Implement auto plays songs of USB flash disk.Not all the car with this interface can use this kind of . Some car AUX without decoding function, so can only use MP3 device, (only car AUX interface have the function of read U disk can use this kind of )When using, U disk had better not store too much£¬ specific to the car AUX can support how much capacity.U disk can not have other documents inside and do not establish folder. Songs of MP3 format is used.100% New & High QualityCategory: D3.5Audio cableConnector: D3.5mm-USBLength: 21cmColor: BlackMaterial: plastic + metalPackage Includes: 5 x 3.5mm AUX Audio Plug Jack to USB 2.0 male Converter Cable Cord