Good to hear that you're taking it into consideration from the start. Even if device adheres to all regulations it would still be a concern to me as standards

Good to hear that you're taking it into consideration from the start. Even if device adheres to all regulations it would still be a concern to me as standards are mainly written around phone use (shorter intervals and from side of the head). Also, as you know, regulations vary greatly between countries so there's no consensus on what is safe. Personally, when on conference calls, I use bluetooth or wired headphones to keep my phone away from my head. If I was to use device like that I would prefer for it to have radios separate but I understand the ergonomics (and cost benefits) of all in one unit.