The digital light meter will allow you to measure the lighting in an areaThe digital light meter uses a 9V battery(not included); Accurate up to 200,000Lux +/- 5%Resolution: 0.1Lux / 0.01Fc , Accuracy:4%,Measurement speed: 2 times / second,Units: Lux & FcHold function, Auto range & Manual range,Auto Power OFF: After approx.15 minutesLow power of battery detecting,Operating Environment: 14 to 122(-10 to 50), 10%~90%RHThis instrument is simple and easy to operate, 4 ranges to be switchable. This pocket design makes it convenient and portable, easy to use and to get a precision reading.Specifications:Display: Large LCD characters displayRange: 0.1~200,000Lux, 0.01~20,000FcResolution: 0.1Lux / 0.01FcAccuracy:4%Measurement speed: 2 times / secondUnits: Lux & FcHold function, Auto range & Manual rangeAuto Power OFF: After approx.15 minutesPower Supply: One 9V batteryLow power of battery detectingOperating Environment: 14 to 122(-10 to 50), 10%~90%RHDimensions: 145 X 67 X 33mm (5.7" x 2.6" x 1.3")Weight: 170g (6.0 oz)