Geartist (TM) GT1010 Digital LCD Lux Meter Illuminance Light Meter Measure Tester Luxmeter (0.1 to 200,000 lux; 0 to 185806FC) Measurement Range: 0.1 to 200,000 lux; 0 to 185806FC Resolution: 0.1Lux / 0.01Fc, Accuracy:  3%RDG+/-0.5 FS Measurement speed: 2 times / second, Power: 9V battery * 1PCS Digital LCD screen with back light, low power consumption with auto power off Low battery indication, High resolution and response quickly, Max / Min measurement function