Quimat QX06 Gardening Tool Kit, 3-in-1 Moisture Light pH Tester, Soil, p5 3-IN-1 FUNCTION - Test soil moisture, pH value and sunlight level of plant with our meter, quickly helps you specialize in grasping when you need to water your plant, control the pH value in the soil and know about whether it gets adequate sunlight. ACCURATE AND RELIABLE READING - Premium double-needle design strongly enhances the speed and accuracy of detecting and analyzing soil moisture, pH acidity, sunlight level for your plants, helps to keep your plants in a healthy condition by accurate data monitoring. NO BATTERIES NEEDED - You can use it indoor or outdoor. Just insert the sensor probe into the soil about 2-4 inches, toggle switch to test moisture, pH, sunlight you would like to measure, then wait for a few minutes till the pointer stops swinging to get a stable reading on the scale dial. If the plant is very dry, the soil pointer will not swing, that means your plant needs water. INDOOR & OUTDOOR USE - This soil moisture meter only used for Soil moisture test. Measure soil's moisture content by just plugging in the probe. Design to be lightweight and portable, easy to carry around for outdoor use. A-must-have soil test tool for outdoor & indoor plants, help you to get an idea of what the plant is currently getting in terms of sunlight/water/pH acidity. Use for plant care, home and garden, lawn, farm. IMPORTANT TIPS WHILE USING - 1.DO not touch the stone or hard rock soil, in case the probes will be damaged by the hard soil; 2.Clean the electrode after using it. Pls do not put it directly in water. It will damage the electrode; 3.Keep the test kit in soil for at least 10 minutes before reading for best performance.