General ToolSmart TS06 Moisture Meter, 5 to 50% Wood, 1.5 to 33% Building Materials, 2 % Accuracy, Digital DisplayThe ToolSmart digital moisture meter is your first step in mold prevention. Water and moisture build up in a home can lead to hazardous and unsafe living conditions. By checking suspicious water stains around the house, you can determine whether the area is wet (a perfect breeding ground for mold) or has long since dried. With the free ToolSmart app, readings can be tracked over time and placed onto pictures for quick and easy reference points. Unit: