My car has a USB port which is great, but it also has software by Microsoft which isn't. This means if I want to play music through the media player I have to use a flash disk since the software won't allow me to pair up my phone (iPhone 4S) and the car. I was wondering if there was a USB dongle I could stick in there that broadcasts bluetooth, that way I could connect to it and play music through my car speakers and it should also function the same as the cars normal bluetooth system which works fine. I think the protocol I am looking for is A2DP but I am not sure and I am not sure if my phone would even support this. Other than that I'm not sure what my options are since the flash disk tends to get a bit irritating.