Gv18 how to control phones audio?

I just received my gv18 smartwatch and other than struggling with the on screen keyboard I'm liking it so far although the vibrate is very weak. Could someone tell me how I could use this with a bluetooth headset as at the moment when connected to my smartphone all audio comes through the watch. I hope this is possible as being able to use a bluetooth headset is one of the main reasons I got this but if I cant control the phones music to play by bluetooth or connect watch to headset I might have to sell it.