Instructions: When measuring the pH and humidity of the soil, first insert the probe into the soil as far as possible, leaving about 1 cm on the top of the probe. Move the button on the pen to MOIST, MOIST is the moisture button, the corresponding table is MOIST, DRY is dry, WET is wet, the value 1-3 (red part) indicates that watering is required, 4-7 (green part) It is suitable, please adjust the watering time according to the variety of plants, 8-10 (blue part) is too wet. Push the button on the pen to PH, PH is the pH key, the corresponding table is 8-3.5 value, ALKALINE is alkali, ACDIC is acid, the value 7 is basically neutral, the smaller the number, the higher the acidity, please according to the plant The variety adjusts the soil pH. The LIGHT button is the illuminance. The measurement range is 0-2000 lumens. The larger the value, the stronger the illumination. Please decide whether you need shading according to the variety of the plant. When using it, be careful not to touch the stone when inserting the electrode. Do not use too much force, otherwise it will easily damage the electrode. Wash the electrode after use.