The Triplett Model MS120 measure moisture content in wood (0.1 to 99.9%) and other building materials (0.1 to 56.5%). It utilizes pinless measurement for non-invasive testing. Low, Medium and High icons indicate moisture level and an audible indicator increases as the moisture level gets higher for quickly scanning large areas. Data Hold freezes measurement on screen for hard to see areas. Self-calibration on power up. For home inspection, water damage restoration, lumber yards, painting, paper mills, textile, clothing manufacturing, and other industries. Includes 9V battery. 1 -year warranty.