Features: This luxmeter has large LCD screen that shows light measurement value. It supports screen locking function, and maximum/minimum measurement value. Automatic ranging and measurement range can be manually switched. Automatic power-off function in 15 minutes without operation make it power-saving. 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: MT-30 Measurement Range: 0.1~200,000Lux; 0.01~20,000Fc Resolution: 0.1Lux/0.01Fc Measurement Accuracy: 4% Sampling Frequency: 2 times/sec. Units: Lux; Fc Battery Type: 9V battery (NOT included) Size: 14*6*3cm/5.5*2.4*1.2in Weight: 130g(approx.) Package Includes: 1 x Luxmeter (battery is NOT included) 1 x User Guide