Description: 3 in 1, for soil moisture, pH and illumination measurements, good helper gardening, No Battery Needed, easy to use. PH meter: measure acidic or alkaline soil conditions. Moisture content meter: measure the correct moisture content to avoid over or under watering. Light amount meter: measure light amount, plants need correct quantity of illumination. Works well in vegetable/ flower garden, lawn and potted plant, perfect for growing vegetables, fruites, flowers, ect. Specification: Material: Alloy Plastic Color: Green Size: Approx. 290x50x38mm/ 11.42x1.97x1.50 inch Probe length: Approx. 200mm/ 7.87 inch How to use: 1. To measure soil pH, humidity: insert the probe into the ground as deep as possible, the probe above the part to stay about 10mm/ 0.39 inch. 2. MOIST key, corresponding table is MOIST, the DRY is dry, the WET is wet, the value 1-3 (red part) indicates the need for watering, 4-7 (green part) is suitable, please adjust the watering time according to the variety of plants, 8-10 (blue part) indicates that it is too wet. 3. PH key, corresponding table is 8-3.5 values, ALKALINE: alkali, ACDIC: acid, the value of 7 is basically neutral, the smaller the number indicating greater acidity, according to plant The variety of soil pH adjustment. 4. LIGHT, measurement range: 0-2000 Lumens, the greater the value, indicating stronger the light is, according to plant varieties to decide whether shade is needed. Package Includes: 1 Piece of 3 in 1 Soil Tester