【Digital Lux Meter】The digital illuminance meter is used to measure the intensity of objects invading light. Lighting intensity has a great effect on human health, especially eye health.【High Resolution and Measurement Range】Measurement Range: 0.1~200,000Lux, 0.01~20,000Fc; resolution: 0.1Lux/0.01Fc; measurement accuracy: + -4%; measuring speed: 2 times/second.【2 Kinds of Units Selection】Units can be switched freely: Lux or FC, 2 measurement modes: maximum / minimum measurement. Digital Lock (HOLD) Function.【2 Ranges, Auto Off】Auto and manual ranges, the default auto range when enabled. Press and hold the HOLD button to select manual range: 200--2000--20000--200000 - AUTO. Automatic shutdown for 15 minutes without operation, low battery reminder function, low battery symbol display.【Wide Application】It has a wide range of applications including but not limited to use in schools , factories, warehouses, offices or homes, from design to exquisite photography projects and so on.