Leaton Digital Luxmeter/Digital Illuminance Light Meter lux meter with LCD Display(Range: 0.1~200,000 Lux Luxmeter, 0.01~20,000Fc) The digital light meter will allow you to measure the lighting in an area The 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 & Fc Hold function, Auto range & Manual range,Auto Power OFF: After approx.15 minutes Low power of battery detecting,Operating Environment: 14 to 122(-10 to 50), 10%~90%RH