Checks for moisture content in wood, paper or cardboard and building materials such as sheetrock, concrete, mortar, plaster, etc. Measurement ranges: Wood/ Paper: 8 ~ 60% Building material: 0.3 - 2.0% Temperature: 0°C ~ 40°C or 32°F ~ 99°F Used in indoor air quality applications for detecting moisture in the walls, floors and ceilings stimulating mold growth LCD display provides moisture or temperature measurement Three color LED provides quick moisture indication: Green - “air-dry conditions Yellow - increased moisture Red - excess moisture Backlight for operation in dark areas Low battery indication Auto power off