Is there a gadget that can screen mirror android to a non smart tv without wifi?

My grandfather refuses to upgrade his tv and insists that he doesn't need wifi because he uses it on his phone. He also won't pay at&t to setup a hotspot, but he wants to watch netflix on his big tv instead of his phone. I was thinking maybe there is some kind of bluetooth tool that will let him cast his phone to his tv without a cable directly wiring him it. Anyone know if this kind of tech is available?