1. FEATURES 1.1 Wide range: from 0.1 Lux to 200,000 Lux. 1.2 Accurate test, fast response, and auto zero-adjustment. 1.3 Data hold: hold the current test result. 1.4 Symbol and unit display, easy to read. 1.5 Low battery indicator and auto power off. 2. SPECIFICATIONS 2.1 Display: 3 ½ digits, big LCD, max display 1999. 2.2 4 ranges: 200 Lux, 2000 Lux, 20,000 Lux, 200,000 Lux. For 20,000 Lux range, the reading need to times 10, then will be correct. For 200,000 Lux range, the reading need to times 100, then will be correct. 2.3 Accuracy: ≤10,000 Lux: ±4% rdg ± 0.5%f.s ≥10,000 Lux: ±5% rdg ± 10. (Accuracy tested by a standard parallel light tungsten lamp of 2856K temperature) 2.4 Repeatability: ±2%. 2.5 Temperature characteristic: ±0.1%/ ℃. 2.6 Sampling rate: 2 times/s. 2.7 Sensor: photo diode and filter. 2.8 Operation environment: 0℃～40℃（32℉～104℉）0～70%Rh 2.9 Storage environment: -10℃～50℃（14℉～140℉）0～80%Rh 2.10 Overload display: top digit shows “1”. 2.11 Battery: 9V, 006P or IEC6F22 or NEDA 1604 2.12 Battery life: continuous 200 hours (alkaline battery) 2.13 Size: 100×60×27mm (sensor) 130×95×30mm (meter) 2.14 Weight：300g 2.15 Accessories: manual, battery, black p