RitZ-MarT 3.5mm Male AUX Audio Plug Jack to USB 2.0 Female Converter Adapter Plug Universal 3.5mm Male please make sure your device have the mp3 decode function, that can read the mp3 file from U-disk 3.5mm male plug jack With USB 2.0 interface USB 2.0 female: connect the Flash Disk, can read the mp3 form Flash Disk