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'''{{PAGENAME}}s''', '''comm-beads'''{{Fn|1}} or comm'''vox-beads''', {{Fn|3}} are short-range communication devices used by the [[Imperium]] that .{{Fn|1}} {{PAGENAME}}s are worn in the user's ear{{Fn|1}} and, if produced to a high craftsmanship, are nearly undetectable by casual inspection. {{Fn|2}} Their range is can be good out to about one kilometre, {{Fn|1}} five,{{Fn|3}} or ten kilometres,{{Fn|4}} but such things as bad weather, dense terrain and intervening rock or [[plasteel]] can greatly reduce this range.{{Fn|1}} {{PAGENAME}} signals can be picked up and boosted through the use of [[vox-caster]]s.{{Fn|4}}