Calculated Industries 7434 AccuMASTER 2-in 1 Magnetic Digital Level and Angle Finder / Inclinometer / Bevel Gauge, Latest MEMs Technology, Certified IP54 Dust and Water Resistant DUAL FUNCTIONALITY -- inclinometer or tilt gauge to set or check relative angles between surfaces, also works as true digital level for tight spots EASY TO READ -- large, bright StayGlow tm display stays on as long as youre using it, improving visibility and usability NEW MEMS SENSOR for better accuracy, longer battery life. Use as mini digital protractor, displays bevels in degrees, IN/FT, mm/M, percent slope STRONG MAGNETIC BASE firmly attaches to saw tables, fences, blades and other metallic surfaces; reversible display inverts when gauge is upside down CERTIFIED IP54 dust and water resistant; includes two long-life AAA batteries, battery-saving auto shut off and protective case with belt loop