Some plants thrive in an acidic environment, while others do best in neutral or alkaline conditions. This easy-to-use meter helps you create the right conditions for whatever you're growing. Simply insert it into the soil for a quick reading of pH, then choose the right amendments to adjust the acid/alkaline balance as needed. Analog dial gives an accurate reading of soil pH units on a scale from 3.0 to 10.0. Aluminum pole has a tapered end that is easy to work into soil. Always ready - no batteries required. Complete instructions included. 2" x 1 1/4" x 10 1/2" high; 2.5 oz.