Easier to leave them connected when you have a 3-4+. Not necessary. If taking a break, just take off the helmet. Same for moving a vehicle. Turn the volume down if distance makes static, like the guy repositioning the truck, doing a lap around the block. Could also take off the helmet and leave at the job site when your running a number of them.
Full duplex means it sounds like a cell phone conference call. Everyone is heard all the time. When one guy is just bucking wood, he clicks out, and back in.
As always, it's better to address who you want to speak to, wait until you have their attention, then converse.
What is really good I'd that anyone can interrupt with a pressing safety concern, unlike walkie talkies.
They make money through efficiency and coordination.
I've paired two with each other, and another two together. Crane operator and me, and then two groundie together. Groundie can always call me on my cell phone. One button push answered the call. Groundie hand up call. One button push to reconnect, out if auto connected back to Crane Op. I forget which.
No going back to yelling.
I can give a new guy to anything in my truck from far, far away. One trip to the truck instead of returning from a walk to the truck for something forgotten at the time of the individual request for gear. While groundie is at the truck, they can ask clarifying questions, like which bag, or what else do you need while I'm here at the truck (gear, food, water, clothing).