OK 2 persons wearing 2 helmets, each with own unit. They need to be able to communicate with eachother and also be connected to the VHF.
Sorry, have not spoken to Derek yet will do it on Wed as my son has his Birth Day and we are now selebrating it for 2 days (today and tomorrow 48 hour party thing he wanted .... and my head hearts
PS As I see it is quite easy. Each has own VHF on his belt with dual wach connected to the helmet thingies and they talk on say channel 71 and monitor also channel 16. Can't think why on earth this set up is so expenssive.