It can be hard to tell why plants just don't seem to do well in certain areas. Is it the soil? Is there enough sunlight? Fortunately, the Rapitest Mini 4-in-1 Tester can remove the guesswork and provide solid answers. It tests soil pH, moisture and fertility, and determines the level of available sunlight in any outdoor area. Gardeners just flip the switch to the desired setting and read the results on the easy-to-understand dial.