not amazing as a Bluetooth device. Microphone didn't pick up super-well

That's disappointing. Seemed to work well in that video, though it was quiet; I did wonder how it would fare in the real world, though.

A Bluetooth version of the TMP communicators might have better success albeit at the cost of having to hold your arm up for the whole conversation.

I've used smart watches for phone calls like that, and it was pretty annoying after not very long at all.

I could probably easily make a Bluetooth TOS communicator, but that would be two roughly phone-sized things to carry around, so not really practical.

OTOH: