Heands Free Bluetooth Car MP3 Player & FM Transmitter with Steering Remote with USB port and SD card port
This one of best gadgets that every one should have. Excellent quality from both USB dongle and from bluetooth phone. I didn't try other options like SD card, auxilury input,...etc. Call quality is good on both sides.    Cons:  1> Remote controller doesn't have option to skip to next folder. I has option only to skip to next song/track. So, if you want to skip to next folder, you need to skip all songs in the current folder.