IN 1 FUNCTION: Not only for testing soil moisture, but also for soil pH value and sunlight level of plants. You can make your plant care easier with the data you get from soil meter. More Accurate & Larger Screen: Double needle improves the speed and accuracy of soil moisture and pH you want to know. Larger screen makes it easier for you to read the value. BATTERY NEEDED & EASY TO USE: Simply insert the sensor probe into the soil about 2-4 inches, toggle the switch to test the moisture, pH, sunlight you want to measure, then wait 5-10 minutes until the pointer stops swinging to get a stable reading on the scale dial. Compact for Indoor & Outdoor Use: Portable and easy to carry anywhere you want. Know when to water, adjust pH or change lighting for your flowers, plants. Refuse to be a plant killer, promote the growth of your plants in , garden, lawn or farm etc. IMPORTANT TIPS -- Do not use it to test water / Do not touch stone or hard soil / Never use it to test liquid. Only for soil