This instrument is designed to measure solar power in the range from 400 to 1100 nanometers; the good spectral range, orientation and angular detection of meter allow users to conduct the most precise quantitative measurements of solar power radiation; solar power measurement with orientation and tilt angle; easy measurement for rate of daylight penetration; auto change for measuring range; auto power off with disable function; instantaneous display Ave/Min/Max values; 20 points memory; socket of tripod mounting magnetic mount; and backlit LCD and 4 digits triple display.