OK, I'm not yet in the market for an upgrade, this is more hypothetical & things could have changed by the time any upgrade is needed.

Currently I have the bluetooth SF4 (group of 4).  I know I can convert the SF4 to the Mesh network via the Mesh adaptor.

If I wanted to upgrade the helmet device anyway... which SENA Mesh device would support audio, _no video needed_.

Also, do ALL of SENA devices fit into the SAME helmet socket, or is rewiring/fitting a new helmet socket needed?