Amazon
Measure solar power light level in watts per square meter (W/m2 ) or BTU (ft2 *h) Built-in solar light sensor with precision photo diode Zero function Data Hold freezes current reading on display
Measure solar power light level in watts per square meter (W/m2 ) or BTU (ft2 *h) Built-in solar light sensor with precision photo diode Zero function Data Hold freezes current reading on display