I want to reverse the bluetooth output - aka

I want to sync my Pid to a bluetooth set of headphones, so I get the directions in my ear on my motorbike.

 

But im not sure if there is an option to do this - has anyone tried it?

Normally the bluetooth is for getting phone calls FROM a phone. I cant seem to figure out how to send the navigation...

That would require a change to the firmware and I doubt there'd be enough demand for that to happen.