Accurate and reliable: Each meter has been tested and calibrated to ensure an accurate reading. No batteries required: Insert into the soil, how many times you need. Compact and portable: Small and handheld design makes it perfect to use indoors or outdoors. Note: Do not insert the meter directly into water to test the moisture. The meter will only test moisture in soil, not water itself. 100% satisfaction guaranteed: Love it, or your money back! If you are not satisfied with the product we'll refund you 100% of the money, no questions asked.