The Extech MO210 Pocket Moisture Meter allows you to quickly assess whether wood and other porous materials have endured any water incursion. Simply push the sharply pointed electrode pins into the surface of sheetrock, drywall, wallboard, concrete, mortar, plaster or other building materials and the device will detect moisture levels between 0.2% to 2.4%. Slide the material-selection switch to wood and the handheld meter will determine moisture presence in timber from 6% to 44%. Complete with protective cap, replacement pins, and three CR-2032 button batteries