I dont want to have to yell anymore... and I cant hear anything sitting in the truck staring up at the trees waiting for the winch rope to be hooked up

Ive looked at a couple of options that friends in the states are using for rockcrawling comps but because the spotter doesnt have to get into the vehicle they all seem to use units that clip to their belts.
What works? what doesnt give any trouble in the bush? what isnt a pain in the ass for the navi jumping in and out all day long?
Thanks ( at some stage I will stop starting threads for odd questions that pop into my head when Im watching you tube
