BETTER ACCURACY: This light meter is a kind of instrument that specializes in measuring luminosity and brightness. The product is equipped with imported silicon diode photosensitive components, which can accurately measure the light and brightness accurately, reduce the error, and make the illuminometer measure steady and reliable. Measuring range is 0-200,000 lux, measurement accuracy ±4%. POWERFUL FUNCTION: MAX / MIN data hold function, MAX MIN data can be saved during the measurement process, so that it would help user to record data easily. Low battery indicator function: It can help you charge in time to avoid accidents. Automatic power off function: It can help you save energy. 1S measurement response time: Accurate data can be obtained quickly. Lux/FC Unit Selection.Battery NOT Included. WIDELY APPLICABLE: Widely used in agricultural research and lighting control in homes, office buildings, warehouses, production lies, farms, aquaculture, stage, stadiums, etc.