Features: This lux meter has large LCD screen that shows light measurement value. It supports screen locking function, and maximumminimum measurement value. Automatic ranging and measurement range can be manually switched. Automatic poweroff function in 15 minutes without operation make it powersaving. The instrument will automatically detect battery, and show low battery symbol to remind user replacing battery in time. It is widely used for factory, warehouse, school, office, family, street lamp construction, laboratory and so on. Specifications: Model: MT30 Measurement Range: 0.1~200,000Lux; 0.01~20,000Fc Resolution: 0.1Lux0.01Fc Measurement Accuracy: +4percent Sampling Frequency: 2 timessec. Units: Lux; Fc Battery Type: 9V battery (NOT included ) Size: 14*6*3cm5.5*2.4*1.2in Weight: 130g(approx.) Package Includes: 1 x Luxmeter (battery is NOT included ) 1 x User Guide This luxmeter has large LCD screen that shows light measurement value. It supports screen locking function, and maximumminimum measurement value. Automatic ranging and measurement range can be manually switched. Automatic poweroff function in 15 minutes without operation make it powersaving. The instrument will automatically detect battery, and show low battery symbol to remind user replacing battery in time.