Feature●HIGH PRECISE SOLAR POWER METER--This solar power meter is a accurate instrument measuring the strength of sunlight●DUAL UNITS FOR CHOOSE--There are two units that can be selected: W/m² and Btu●DATA AND MAXIMUM DATA ENSURES EASIER OPERATION--Solar power meter supports maximum value hold function and data hold function●STABLE AND DIRECTLY MEASURING--Measure directly without adjustment, steadily measure for a long period●WIDELY APPLICATIONS FOR VARIETY FIELDS--Widely used for solar radiation measurement, solar energy research, meteorology, agriculture, physical and optical experimentsDescription