Jungle Club's 3-in-1 Soil Moisture Meter ensures the health and quality of your plants by helping you know when to water, the pH level and how much light your plant needs. To use, stick the probe 2-4 inches into the soil and adjust until the dial swings. After 10 minutes, note the moisture/pH/light level in the dial. Remove and wipe clean after use. . Dimensions | 10" x 3" . Good for indoor or outdoor use . No battery needed . Helps prevent over watering . 3-in-1 tests moisture, pH value and light level using two 20cm probes and a light sensor with three calibration tables for high accuracy and response . Disclaimer: Image of new box design is a digital renderings, physical product may vary in color from the images.