Angle Finder/Protractor provides fast and accurate measurements in woodworking, construction, machinery, telecommunications, automotive, and more. EBTN LCD is convenient to read. Small and light, it is really easy to carry and use. The measuring plane contains a magnetic disc which can be attached to the surface to be measured. It is especially easy to measure helicopter pitch, miter saw bevel angle, automotive test and repair, etc. Features: Small and lightweight makes it convenient to carry Strong built-in magnets on the base secure the attachment to any iron surface The big screen EBTN (Enhanced Background Twisted Nematic) LCD dramatically improves the reading experience, illuminated numbers and letters on a black background make it very easy to read even in direct sunlight or low light. The display reversed automatically when head down. Auto power off after 3 minutes of inactivity Specification: Measuring range: 4*900-360 Accuracy: +/- 0.1 degrees at 0 and 90 degrees and +/- 0.2 degrees the rest Resolution: 0.05 degree Waterproof: IP54 Power supply: 2 AAA batteries (batteries included) Packaging included us: 1 x Digital Level Box 2 x AAA Batteries 1 x Carry Bag 1 x User Manual 'user