Product Features High Quality & Convenient: Large digital LCD display with backlight. Extra LCD is convenient to read. Small and light, it is real easy to be carried and used. High Accuracy: Use high-sensibility sensor for precise measurement, accurate, fast and easy use. Switch: Auto power off after 5 minutes of no operation. Built-in Magnets: Angle finder with the strong magnetic on the base to fix firmly on the measurement object, such as pipes, saw blades, vents, ducts, and other ferromagnetic surfaces. Applicable Fields: Angle finder/protractor provides quick&accurate measurement in woodworking, construction, machinery, telecommunications, automobile etc. Application: Measuring plane contains disk magnet which can be attached to the surface to be measured. It is especially easy to measure the pitch of helicopter, bevel angle of miter saw, automobile test and repair and so on. Product Specification TypeDigital LCD Inclinometer Protractor Measuring Range490?a Accuracy+/- 0.1 degrees Power2AAA battery( not included) SwitchAuto power off after 5 minutes of no operation FeatureMagnetic, 4*90?a, LCD display, small and light, high accuracy ApplicationWoodworking, construction, machinery, telecommunications, automobile Package Included ??2 x Digital Level Box ??2 x User Manual s