ITEM NAME:3 in1 Soil PH Tester Water Moisture Light Test Soil / Moisture For Garden H8W0 Soil hygrometer / soil pH meter / light intensity meter (three functions) Humidity detection uses the "MOIST" file. Select the soil without stones to insert the probe, the depth of insertion is about 1/3 of the probe. At this time, the humidity value can be read on the middle scale (DRY-WET) and water can be added if necessary. General instructions: Red area (1-3): Values do not need to be watered only when dry and the pointer enters the line color area (cactus, etc.) below half the range. Green area (4-7): Values need to be watered regularly when the pointer enters the green area, such as begonia, pineapple, litchi, Tianzhu, sunflower ball, orchid, poinsettia, foxtail, saxifrage ... ..Wait. Blue area (8-10): Do not water, otherwise it will drown the plants. Use the "LIGHT" file and refer to the following table to determine whether the value of object lighting is appropriate, otherwise adjust the light source or change the position of the plant. PH (acid-base area) detection: Use the "PH" file. Wipe the probe clean with a paper towel or cotton cloth, and insert it into the moist soil. If the reading is outside 6.5-7.5, lime should be added to increase the alkaline or acidic substances. The typical PH value of acidic vegetables is 5.5-7.0, and the fruits vary. . Single product weight: 102g.General instructions: Red area (1-3): Values do not need to be watered only when dry and the pointer enters the line color area (cactus, etc.) below half the range. Blue area (8-10): Do not water, otherwise it will drown the plants.