General Tools MMD3E Pin Type Digital Moisture Meter Pin type digital moisture meter; Ideal for use in woodworking, building construction, home inspection, lumber selection, and water-damage restoration Features 99.9 count LCD with 0.4 inch high digits; wood/building materials selection switch Low, Medium and High moisture tones and on-screen icons Data hold, auto power off and low battery indicator Replaceable stainless steel pins (Number PIND3E) sold separately; power source is 1 9v battery (included)