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By certification 
specifications
Power source:24V-80V Power output: 30 W Recording time: 120s Audible range: 360m Weight: 376g Dimension: (L)150mm*(D)136mm functions: Talk/Record/Play
With USB and SD card
Power source:24V-80V Power output: 30 W Recording time: 120s Audible range: 360m Weight: 376g Dimension: (L)150mm*(D)136mm functions: Talk/Record/Play
With USB and SD card
