Every plant, flower, shrub has their own ideal growing conditions. With the help of this tester you can easily and instantly measure what your current soil levels are and compare them to what you need to help your item grow and flourish. This 4 Way Analyzer is compact, portable and measures the essentials for vigorous growth. The tester is ready to use and no batteries are needed.The Analyzer has an easy side slide switch to change between the 4 testing modes. * Available sunlight reaching your plants * Soil Moisture Levels * Soil Fertility Levels (Combined nitrogen, phosphorus & potash levels) based on USDS Standards * Soil Alkalinity/ Acidity (PH) Levels ~~Also included is a complete easy to follow instructions on how to adjust your soil levels to help promote proper and sustainable growth and life for your flowers and gardens.