Material: ABS Size: Approx. 10.2 x 4.3 x 1.2 inches (26 x 11 x 3 cm); How to Use: 1. First, pull the soil up to a depth of 5.1 inches (5 cm) to remove organic impurities that affect the test results 2. Saturate the soil with water until the soil becomes sticky and fertilizer. 4. Remove the probe 5. Soil throughout the probe After use, remove the probe after 6. 1 minute to insert the test results. Fertilize once a month Too much means that fertilizer is not required now. Can be used to plant in new soil. Do not add chemical fertilizer to allow too many water rare nutrients. Package list: 1 * Soil pH meter