The General Tools MM17 Moisture Meter is a digital, pin-type moisture detector designed for measuring moisture levels in wood, drywall, and other building materials. It features an easy-to-read backlit LCD screen, a protective cap that doubles as a calibration checker, and an ergonomic design for one-handed use. Ideal for DIYers and professionals, the MM7 helps identify potential water damage and prevent mold growth by providing accurate, real-time moisture readings.. Battery Power Type: Carbon Zinc. Battery Size: 1.5-volt. Control Type: Digital. Display Type: LCD. Features: Auto Shutoff,Low Battery Indicator. Included: Batteries. Material Compatibility: Drywall,Wood. Maximum Moisture Reading (%): 50. Maximum Sense Depth (in.): .3. Minimum Moisture Reading (%): 1.5. Number of Batteries Required: 2. Power Source: Battery Operated. Probe Type: Pin. Product Weight (lb.): .3 lb. Returnable: 90-Day. Certifications and Listings: CE Certified,FCC Certified. Product Depth (in.): 1.9 in. Product Height (in.): 7.7 in. Product Width (in.): 2.4 in. Material Compatibility: Wood. Probe Type: Pin. Material Compatibility: Drywall