1、The digital luxmeter is a professional insument for measuring illumination and brightness. 2、 Functions: Backlight and data holding,automatic power off,Automatic and manual storage data. 3、 Widely used in used in light intensity measurement engineering,qualily conol, offices,ansportation routes, families,etc. 4、Measure current illumination and temperature. 5、Measure difference value, max value and min value. Features: The digital luxmeter is a professional insument for measuring illumination and brightness. Functions: Backlight and data holding,automatic power off,Automatic and manual storage data. Widely used in used in light intensity measurement engineering,quality conol, offices,ansportation routes, families,etc. Measure current illumination and temperature. Measure difference value, max value and min value. Switch between illumination and temperature unit. The measurement range is0-200000lux, auto switch of measurement gear. acklight and data holding,automatic power off,Automatic and manual storage data. Specification: Model: WT81 Total measuring range: 0-200,000 Lux Temperature measuring range:-9.9~49.9° Illuminance accuracy: ±3%rdgbelow 10000 Lux; ±4%rdgabove 10000 Lux Temperature accuracy:±1.0° Operating temperature/humidity:0-40°, 10-90%RH Storage temperature/humidity:-10-50C, 10-90%RH LCD screen update:2 times/s Power: 3 x 1.5V AAA batteries not included Size: 195*55*30mm/7.7*2.2*1.2in Weight: Approx.200g/7.1oz Package list: 1 * WT81 digital luxmeter batteriesnot included 1 * Manual