iKKEGOL 3 in 1 Water Moisture PH Light Meter Plant Flowers Sensor Garden Soil Analyzer Tester Tool 3-IN-1 FUNCTION - Measure soil's moisture, pH and light sensor by just plugging two 20cm probe NO BATTERY NEEDED - No batteries or electricity needed, just plug and read FAST READ - Use the Moisture Meter to easily check on the condition of your plants. The meter will quickly tell weather your plant is doing well; dry and needs water or wet and could use a day to dry out. You will never over/under water your plants again. IMPORTANT TIPS - Design for testing soil ONLY.Do not touch the stone or hard rock soil, avoid damage the probes and please clean and wipe the probes after using. GARDENING MADE SIMPLE - Find out what your garden or lawn needs with a little help from our soil test kit! You can know when need to water your soil, plant is getting adequate light and control PH level in soil