Good morning!

My question would be: is it possible to use 3 SMH10-s and a SMH5 in the conference mode.
The reason I'm asking this is that we have 3 bikes and 4 riders in our group, one of us is a pillion.

The idea was to buy SMH10-s for the people doing the active riding and SMH5 for the pillion :)

Would it work?

At this point I have found a video leading me to believe it wouldn't: https://www.youtube.com/watch?feature=player_detailpage&v=jp_8hi5FvuM#t=30s