Contact probes are on a 3-foot coiled cable for detecting moisture in hard to reach spots. The 10-point scale corresponds to moisture levels from 10 to 28%. Scale and reference chart correlate relative and moisture percentage readings. Requires one 9-volt battery (not included). Instruction sheet included Great for inspectors, contactors, and homeowners Find out if potentially damaging excess moisture is present Test hard or soft wood, concrete, plaster, carpet, and more to determine the extent of moisture problems. Locate and trace roof leaks and water seepage; assess the extent of wet rot and hidden condensation. Use it to check surfaces before painting, wallpapering, or laying floors or tile. Helps you to select drier lumber. Contact probes are on a 3-foot coiled cable for testing in hard to reach spots. Dual reading scale gives relative (1 to 10) and moisture percentages (10 to 28%) readings Requires one 9-volt battery (not included). Instruction sheet included 1-year warranty