The Sonin Digital Moisture Meter is a great tool for anyone who needs to measure the moisture content in wood, sheetrock, carpets and more. It is compact and lightweight making it easy to use in the shop, take on a job or when going to buy materials. Test moisture content between 5-Percent to 40-Percent. The large LCD display is easy to read. Helps you find out of potentially damaging excess moisture is present. Locate and trace roof leaks and water seepage and assess the extent of wet rot and hidden condensation. Use it to check surfaces before painting, wallpapering or laying floors or tiles. A replacement probe and protective case are included. Requires one 9v battery (not included).