In my opinion, the best bike-to-bike communications system is the good old 40 ch CB radio ,,,,

some folks pooh-pooh it just because of the days of "smoky and the bandit" ,,,, but ,,,,

27mhz CB radio is approved by the FCC for mobile operation ,,,,,

27mhz CB radio is on about every Honda Gold Wing ever made ,,,,

27mhz CB radio is on every Harley Ultra Classic ever built ,,,,,

27mhz CB radio is offered on many other brands of touring bikes sold throughout the USA and North America ,,,,,

27mhz CB radio is on tens of thousands of cruiser style bikes, thanks to the J&M JMCB-2003 radio ,,,

27mhz CB radio will transmit and receive at distances of 1/2 - 5 miles depending upon atmospheric conditions and the length and tuning of the antenna ,,,,,

when group riding ,, no matter how large or small the group, ALL members of the group can talk and hear the conversations on the specific channel that is chosen ,,,

 

Chatter Box very good