Product Specifications: *Measuring range:0Lux200,000Lux/0Fc185,806Fc *Accuracy: 3% rdg0.5%f.s.(<10,000Lux) 4% rdg10dgts.(>10,000Lux) *Digital Updates:2 times / s *Photometric sensor:Silicon diode *Battery life:Not less than 60 hours *Operating temperature and humidity:0 40, 10%RH 90%RH *Storage temperature and humidity:-20 50, 10%RH 90%RH *Power:9Vbattery *Unit size:52.5*35.5*166mm *Net weight: 110.4g *LUX (Lux) / FC (footcandles) Unit *selection function *After 5 minute auto power off *Backlight function *Maximum and minimum measurements *Automatic measurement function(AUTO) *Data rise and fall time is short *Low battery indication