This Rapidtest Digital Soil Test Kit is designed to make soil testing easier than ever. At the heart of the system is the Optical Soil Test Chamber that will recognize the colour hue specific to the your soil's pH and nutrient levels. A dropper is provided to facilitate tranfering the test solution into the tubes. The kit also includes a tube holder, which will hold all four tubes as they are developing. Reads test colors utilizing advanced LED digital technology Just push test button to get results in a few seconds Includes pH preferences for over 450 plants and how to adjust soil pH Booklet has fertilizer guidelines based on nitrogen, phosphorus and potash test results. Performs 25 tests: 10 for pH and 5 each for Nitrogen, Phosphorus and Potash