Product Specifications: Sunlight (9 levels), soil moisture (5 levels), soil pH (12 levels), temperature (°C & °F) testing range Sunlight (9 levels): LOW-, LOW, LOW +, NOR-, NOR+, NOR +, HGH-, HGH moisture (5 levels): DRY +, DRY, NOR, WET, WET +PH (12 levels): 4.0 - 9.0 - 9.0 - 9.0 pH temperature: -9.0 - 9.0 pH Temp. 9~50°C (16 to 122°F) Temperature: 1°C / 1°F pH: 0.5pH Illumination Measurement A. Press the ON button to turn on the device. B. Align the high point light source sensor window. C. The current light intensity is displayed on the LCD. Product display PH range measurement: A. Press the PH / button on the back to move to PH location. B. Insert the probe vertically into the soil and test it as soon as possible. C. Press the ON button to start measuring. D.Test pH value will be displayed on the LCD screen. E. has been measured several times to get the exact value. Tips: 1.Do not insert stone chips or hard soil in the probe to avoid damaging the probe. 2. Wipe the probe and clean after each use. 3. Do not leave the meter in the soil for a long time. 4. Designed to test soil, do not use it to test pure water or other liquids. 5. If the indicator is not moving soil too dry, please clean water first, and test again later. Wide application: Ideal and necessary tools for gardeners, indoor and outdoor plants, farms, science laboratories, gardens, lawns. This project is a good tool for testing soil conditions such as fruits, flowers, vegetables, shrubs, etc.