3.5mm Male AUX Audio Plug Jack to USB 2.0 Female Converter Cable Cord Car MP3 RitZ-MarT USB 3.5mm Male AUX Audio Plug Jack to USB 2.0 Female Converter Cable Cord. Stereo extended/music tone pure and clean / Use for vehicle navigation, vehicular audio The 3.5 plug of the line connect to the AUX interface of the car , the USB interface connect to the U disk. Implement auto plays songs of USB flash disk. This cable cannot work for Apple device, such as iphone, ipad, iPod, etc. Please make sure your device has mp3 decoding function, that can read the mp3 file from U-disk