We monitor food temperature to check its cooked to perfection, so why not monitor soil conditions and grow plants and veg to perfection too. Our 4-in-1 soil analyser measures root moisture with five readings (very dry-very wet) and light intensity (very low-high). It also monitors the PH of soil (3.5-9), and soil temperature (-9 to + 50C°) for fabulous results. Large, easy-read LCD backlit screen. Probe, L20cm. Use for indoor and outdoor plants. 1x 9V battery (included).