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RT97 repeater for the outdoor large event is a great option when the handheld radio can’t cover more distance. The security agency normally has some outdoor activities to keep order, like a vocal concert, sports events, and so on. The handheld radio is the main device for communication, if the more big environment, maybe the only handheld radio can’t meet with the requirement, At that time, there’s a small and weight repeater what will solve the problem