Moisture detector is non-invasive, non-marring and is ideal for detecting moisture under finished surfaces The water leak detector has separate settings for drywall, masonry, softwoods and hardwoods Moisture detection tool has a 3/4 inch (20mm) maximum sensing depth and +/-4% accuracy on wood Wood working tool is auto-calibrating and operates on 9V battery; 2-inch diagonal backlit LCD screen and a 3-color LED bar graph Moisture meter features HOLD button, auto power-off function, out-of-range alarm and low battery indication, Weight: 0.25 Pounds, Manufacturer: General Tools Mfg Co In