Specifications Measuring Range: 200 / 2,000/ 20,000 and 200,000 Lux (20,000 Lux. rangereading x 10 ; 200,000 Lux range reading x 100) 20 / 200 /2,000 / 20,000FC (20,000FC range reading x100)  *** 1FC = 10.76Lux *** Accuracy: ±3% rdg ±0.5%f.s. (±5% rdg ±10dgt as > 20,000Luxor 2,000FC range)   (calibrated to standard incandescent lamp at color temperature2856K) LCD Display : 3-1/2 digits Sampling time (Measuring rate): 0.2times / second Photo detector type: Silicon PhotoDiode with Filter Repeatability: ±2% Temperature Characteristic: ±0.1%/ °C   Operating Temperature: 0 ~ 40°C (32~ 104°F) Humidity: 0-80% Rh   Storage Temperature: -10 ~ 60°C (14~ 140°F) Humidity: 0-80% Rh Over-range indication Low power consumption Dimension: photo detector:100 x 60 x 28mm meter body: 149x 71 x 41mm photo detectorlead: 150cm Power: 1 x 9V Battery Typical Battery Life : 200 hours(alkaline battery) Weight: 250g