LotFancy MD-812 Digital Moisture Meter for Wood Sheetrock Flooring Firewood and More, 2-Pin Type, Large LCD Display Batteries NOT included, 9V battery required, measuring range: 5% - 40%, accuracy: +/- 1% Ability to store data and measured values in memory Low power indicator, modular sensor pins, 2-Pin Type Moisture meter is ideal for use in woodworking, building construction and agriculture industries Ideal tool to locate moisture in sheetrock, carpets and sub-flooring; 1-Year Warranty: Money-back satisfaction guarantee