ST6813 Portable Digital LCD Light Illuminance Meter Photometer Illuminometer Instrument 1-100000 Condition: Item Type: Light Meter Material: ABS Weight: Approx. 313g / 11oz Product Size: Approx. 19x6x3cm / 7.5x2.4x1.2in Range Lx:1000,10000,100000, FC:100,1000,10000 Acccuracy  ±(3%+5lux)(at 2854°K incandescent lamps), ±(6%+5Lux) others Cosine angle deviation characteristics, 30°±2%, 60°±6%, 80°±25% Calibration  Calibrated to a standard incandescent light at color temperature 2854°K  Resolution  Lx: < 1000:0.1Lx;  ≥1000:1Lx , FC:<100:0.01FC; <1000:0.1FC; ≥1000:1FC Sensor  Silicon photo-diode and spectrum response filter  Operating Conditions     Temperature: -10-50℃, Humidity: < 80%RH  Altitude: <2000m Storage Conditions   Temperature: -10-50℃, Humidity: <70%RH Sampling Rate Approx 2 times per second Spectrum Range 320-730nm Auto Power Off 10minutes Power 3x1.5V AAA Battery (Battery Not Included)