Wyze Headphones pairing with Anytone 878

I have a brand new hand-held 2 way radio made by Anytone it’s an 878 model that has bluetooth connectivity. When I attempt to pair the WYZE headphones with the radio I hear “connected” and they seem to pair but no audio or microphone functionality results. Wonder where the problem lies in either the radio or the headphones ?? Link to radio below. Thanks for any input