Efanr [2 Packs 3.5mm Male Car AUX Audio Plug Jack to USB 2.0 Female Adapter Converter Cord Cable White Please make sure your car have the mp3 decode function, that can read the mp3 file from U-disk Make sure your car has aux 3.5mm port Only used on Auto Car by U Disk,Flash drives.Do not support any Cellphones.Pay attention to these things before you buy it Use U disk capacity is not too large, U disk can not have other documents, Can not create another folder, Use MP3 download. There are car audio decoding function can be directly inserted U disk adapter cable through which songs to play U disk car stereo