Longer and slender 295mm electrode for deep penetration into the soil and trouble-free life Self-Powered, no battery is needed, Accurate and reliable Waterproof metal electrode/probe Fast pH & moisture measured reading Measures pH and moisture value of different kinds of soil Passed the quality and safety standards Great for quick pH & moisture of Gardens , Lawn Maintenance, Greenhouses and Vegetable production Specifications: Extra long 295mm metal electrode Soil pH measuring range : 3 - 8 pH Soil Moisture level : 1 - 8 Accuracy : 0.2 pH (suitable for agriculture field or educational experiments) Operating temperature : 5 - 50 Celsius (41-122 Fahrenheit) Calibration : light polishing to remove oxidation from metal rings Colour:black Material:plastic Package Contents: 1 * Soil Tester Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.