Fast results...measures pH levels from 3.5 to 9.0 in 60 seconds. Special cleaning pad for probe is non-abrasive to maintain proper surface area for accurate readings and long life. Probe constructed of special materials to accurately detect soil alkalinity and acidity levels. Easy-to-read dial. Quality molded case is impact resistant, wipes clean and protects the fine quality movement. Convenient flexible cord for reaching into overhanging plants and large planters. Instruction manual included for easy soil pH adjustment.