3 in 1 Soil Water Moisture Acidity Light Sensor Portable Soil Moisture Sunlight pH Meter Tester for Garden Plant Flowers Testing ToolsSpecification:Material: PlasticProduct Size: 260*62mmProbe Length: 20.5cm (Can not be measured directly in water)Product Feature: Moisture Detection, PH Value, Light SensingProduct Instructions:Insert the probe into the soil as deep as possible first, And the probe should be inserted into the soil in a position greater than 10cm of the probe.1: Move the key on the pen to keep it moist. Moist is the key to moisture, a suitable table is damp, dry is dry, and wet is wet. Values 1-3 (red part) indicate that watering is required; A value of 4-7 (green part) is suitable, you should adjust the irrigation time according to the plant variety; A value of 8-10 (blue) is too wet.2: Toggle the key on the pen to light. Light is the intensity of illumination. The measuring range is 0-2000. The higher the value, the stronger the light. Please decide if you need shade according to the plant variety.3: turn the pen key to PH. PH is the key of pH, the corresponding table has a value of 8-3.5, alkaline is alkaline, ACDIC is acid, a value of 7 is basically neutral, the smaller the value, the higher the acidity, adjust the pH of the soil according to the diversity of plants. Note: When using, please be careful not to touch the stone when inserting the electrode and not to use too much force, otherwise it will easily damage the electrode. Wash the electrode after use. Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2cm measurement deviation due to manual measurement.1 * Soil Detector