Default [Q] Using Bluetooth for Speech-to-Text (Hangouts, Gmail e.t.c)

Hey everyone,

So I've searched everywhere but can't seem to find any resolution or even a thread on this issue. I am basically trying to do Speech/Voice to text via keyboard app in Hangouts/Gmail through my Bluetooth headset but can't seem to get it to work. It still only pics up via the mic.

This is mostly for in the car.

Has anyone tried to do this?

Thanks