Convenient to use, simple to use, solid quality. Could test soil fertility soil pH. It is lightweight and portable design, convenient for indoor and outdoor use. Battery is not required; easy to use. Soil analysis tool kit ideal for flowers, vegetables, gardens, potted plants, lawn and farm. Kit Soil analysis tools ideal for flowers, vegetables, gardens, potted plants, lawn and farm.Using the method: 1. Measure the pH of the soil, as much as possible to probe deep into the earth and probe the top for about 1cm. 2. On the table is 2.5-9 numeric, 7 basic numeric is neutral, the smaller the number, the higher the acidity, please adjust the soil pH value according to the plant varieties. / P 3. Please pay attention to insert the electrodes without touching the stone, not too hard, otherwise easy to damage the electrode, clean the electrode after use. Specification: Equipment: Plastic Accuracy: about ± 0.25 pH (20 ℃) ​​± 0.2 pH (Suitable for agricultural or educational experiments) Operating temperature: about 0 - 50 ° C (32-122 ° F) Size: 11 x 6 x 3cm / 4.33 x 2.36 x 1.18 inch (approx) Probe length: 16cm / 6.30inch (approx.) Package Included: 1 x Soil pH Tester Note: This does not include 'other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the picture. 'item. Due to manual measurement. Please allow deviation. Thank you!