sansa clip+

can I plug a usb micro blue tooth to a sansa clip+ and use a motorola S305 blue tooth head set to listen to music

As answered in your other thread:

I’m doubtful, as the audio in the Clip+ comes out the headphone jack and not the USB connection (which is for power and data).  Also, the Clip+ uses a miniUSB, not micro connection.  Now, if the bluetooth dongle connects to the headphone jack, things would be different.

You need a blutooth transmitter that connects to the headphone jack. A blutooth adapter with a usb plug needs to connect to an item such as a pc that is a usb host. I don’t know of any mp3 player that is a usb host.