The #MM1E is ideal for measuring the moisture content of wood and construction materials. It can be used to locate water leaks in roofs, floors and walls, to check for moisture in carpets and sub-flooring, and to make sure that wood and drywall is dry enough to be painted, wallpapered, sealed or treated. The MM1E measures moisture in two ranges (7% to 15% WME- Wood Moisture Equivalent - and 16% to 35% WME) on its 10-LED graph display. Pin length is 0.2 inches (5 mm). The protective cap doubles as calibration checker. It features full and low battery indications, comes with an included 9V battery and is CE and RoHS approved.