General description This three-in-one soil tester is ideal for gardening, farming, and outdoor plant care. It accurately measures soil pH, humidity levels, and light to ensure optimal growing conditions for your plants. Technical specifications Measurement Depth: 3-5 inches Probe Diameter: 4 mm Power Supply: 3 AAA batteries (not included) Usage Remove the red cap at the end of the probe. Turn on the tester and insert the probe into the soil 3-5 inches deep. Press the "MEAS" button and wait about 10 seconds to get the test data. Press and hold the "MEAS" button to switch between °C and °F. Note: Avoid inserting the probe into the root system during use. Other information Backlit LCD display for clear visibility day and night. Made of high-quality ABS material for durability. Designed for soil only; not suitable for sawdust, pebbles, powder, granules, or organic matter.