1.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%. 2.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. 3.HIGH PERFORMANCE: The lux meter have a 180° rotation sensor(only one direction), which is convenient for users to adjust. It also has soft function keys for a comfortable pressing experience. The outer casing is made of high-density polyethylene, which is non-slip and anti-drop. 4.LED DISPLAY: This light tester has a large LED backlight screen that allows users to easily cope with harsh environments such as darkness, making it easy to read and users from time and place constraints.