Dimensions: 6-1/2" Tall X 2-7/8" Wide X 1-1/2" DeepMeasurement Ranges: Softwood (0 to 53 Percent), Hardwood (0 To 35 Percent), Drywall And Masonry (Relative)Accuracy: +-4 Percent On WoodMaximum Sensing Depth: 3/4"Operating Temperature: 32 Degrees To 104 Degrees FahrenheitPower Source: (1) 9V Battery - IncludedIdeal For Measuring Moisture Content Of Wood, Drywall, Subflooring And Other Building MaterialsDetect Potential Problems Without Making Pinholes Or Marring SurfaceAuto Calibrating, Auto Power OffSeparate Settings For Different Material Types