Longer and slender 118mm 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 & fertility measured reading. Measures pH moisture and fertility value of different kinds of soil. Passed the quality and safety standards. Great for quick pH & moisture & fertility of Gardens , Lawn Maintenance, Greenhouses and Vegetable production. Correct PH reading is very essential to achieve optimum results. such as vegetables, flowers and shrubs, trees, weeds and fruits are pH dependent and rely solution to obtain nutrients. Soil pH value plays an important role in the production of quality . Most cannot survive in soil that is too acidic or alkaline. Knowing the nutrient levels in your soil is to determine what you need to add to your soil to maximize the growth of your plants. How to used: Step 1: Clean the soil layer's all organic impurities which may affect the test results, such as the leaf or the root. : Clean the probe tip with wipes or abrasive cloth. Step 3: Insert the probe tip in the testing soil, the probe tip should LEVEL with root. Step 4: Reading the result when the value is stable Step 5: Testing it again on the different place of the testing soil, then calculate the average value. Colour:Black Material:Plastic+Metal Package Contents: 1 * 3-in-1 Soil PH Meter Only the above package content, other products are not included. Note: Light reflection 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.