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By certification 
product specifications:
Power source:3.7V-6V Power output: 5W
Recording time: 10s Audible range: 300m Weight: 375g (without battery ) Dimension: (L)249mm*(D)150mm functions: Talk/Record/Play/Siren
Battery: use 1 piece rechargeable battery
Power source:3.7V-6V Power output: 5W
Recording time: 10s Audible range: 300m Weight: 375g (without battery ) Dimension: (L)249mm*(D)150mm functions: Talk/Record/Play/Siren
Battery: use 1 piece rechargeable battery
