The Triplett Model MS40 Pen Style Pin Moisture Meter quickly measures moisture reference levels in wood, wall board, sheet rock, cardboard, plaster, paper, fabric, and other building materials. Results are displayed on the eight easy-to-read dual range LEDs that indicate 16 moisture levels. In addition, it features an easy-to-use two button operation, wood density (0.3-0.6 g/cm3; 0.6-0.95 g/cm3), and low battery indication. Auto power off conserves battery life. Complete with protective cap, built-in pocket clip, and one AAA battery. 1-year warranty.