Measuring Range 1~100.000lux Accuracy ±3% Unit Selection lux /Fc Measure Level Selection Manual Repeatability ±2% Sampling Frequency 1.5 time/sec Resolution 1lux Response Time 1s Data Hold Function √ Electricity Indication √ Overload Indication √ Auto Power Off √ Max/Min/Difference Reading Function √ Working Environment 0~40℃ PACKING INFORMATION Power 9V DC battery (not including) Product Net Weight 209g Product Size 151*83*26.5mm Packing Style Gift box Standard Quantity Per Carton 20pcs Standard Carton Size 62.5*45*28.5cm Standard Carton Gross Weight 16kg.