Portable, light,Quiet, ionization indicator, airflow speed Control Warning function: It buzzes as ion balance higher than +/-25V. It can be amended according to customer request. Air coverage 300mm ?300mm ?900mm. Apply to internal machinery, working bench, assembly line, etc. Specification: Operating Voltage 110V/60Hz ,220V/50Hz Current Consumption 0.13 A or 0.06A Operating Temperature 32F(0 )~122F(50 ) Air Coverage 30cm?0cm Size 195mm(L) ?88mm(W) ?263mm(H) Weight 1.66kg Air Volume 50~90CFM Limited Power ≦15W Ion Balance 0V ?5V Decay Test Results: Distance Decay Time 300mm 0.8s 600mm 1.7s 900mm 4.3s