1) Soil moisture (Dry/Normal/Wet) 2) Soil pH value 3) Temperature and 4) Environment (Sun) light intensity by using a probe with the length of 200 mm. - Measuring Range pH : 3.5 to 9.0 (display resolution 0.5) - Temperature: -9~50°C (16~122°F) - Sunlight 9 levels: Low-, Low, Low+, Nor-, Nor, Nor+, High-, High, High+ - Moisture 5 levels: Dry-, Dry, Nor, Wet, Wet+ - Display : Digital L.C. D with back light - Power Source Battery: 9V X 1 - Dimensions main unit: 122(L) X 63(H) X 36(W) mm - Probe Length: 200mm - Weight Approx: 180g - Automatic power off : Yes