4-in-1 Soil Tester: -- You can measure soil pH value (3.0-9.5, 10 levels), sunlight intensity (9 levels), humidity (5 levels) and soil temperature. It is helpful for you to control the watering, temperature, pH value and sunshine time of your plants to help them grow healthy and strong.Easy to Use: -- No battery required, just insert the sensor probe into the soil on a 10cm rocker switch to test the moisture, pH, sunlight you want to measure, then wait for a few minutes until the pointer stops swinging to get a stable reading on the scale dial.Accrate & Reliable: -- Premium double needle sensing technology highly improves the speed and accuracy of detecting and analyzing soil moisture and pH acidity, promotes plant growth more effectively. healthy.Indoor and Outdoor Use: -- Designed to be lightweight and portable, the soil pH meter is easy to carry for outdoor use and is an ideal soil testing tool kit for home plants, garden, lawn and farm.Notice: -- Do not touch the stone or hard rock soil, if the soil is too hard and dry, it is easy to damage the probes. This soil tester CAN ONLY be used in soil, it CANNOT be used to test liquids. After use, you need to clean and wipe the probes.