You can count on our General Tools Moisture Meter MMD900 to give you the most accurate readings for detecting water build-up. Our tester is used for wood, drywall, concrete and has 2 measurement modes. It can detect low, medium, and high damp tones and features green, yellow, and red LED visual alerts. The audible out-of-range alarm so you will be able to hear a high mildew alert. This scanner has a sturdy, ergonomic shape and rubber side grips for comfort even when used for multiple angles. The protective cover doubles as a calibration checker, providing a spare pin compartment. Our monitor features a hold function to freeze a reading and has auto power-off with an adjustable trigger. It includes a custom hard plastic carrying case, and replacement pins are available. It's a great gift for contractors, woodworkers, and homeowners.General Tools has been a recognized leader in the innovation, design, and development of specialized home inspector tools for many years. We encourage craftspeople, artisans, and DIYers to work smarter, measure better, and increase productivity.