A great gift for your family and friends Scopesuitable for woodworking, water damage repair , construction and decoration of the house. Check for moisture on the carpet, floor, ceiling and walls or below the surface. Measure the moisture content of wood and building surface before painting, wallpapering, sealing or treating Four buttons: / button. Short press to change units. MODE button. Short press to choose different modes for different measured materials. Hold data and backlight button. When pressed briefly, it freezes the display readings; press and hold for > 2 seconds to turn on/off the backlight manual calibration: protective cap with calibration resistor inside, easy manual calibration, the test probe can be replaced. A pair of test probes are included in the package. In addition to measuring the moisture content of the material, can also measure the air temperature Backlit LCD display: LCD display, backlit display for easy use in dimly lit scenes