Description: Angle Finder/Protractor provides fast, accurate measurements in woodworking, construction, machinery, telecommunications, automotive and more. The EBTN LCD display is convenient to read. Small and light, it is really easy to carry and use. The measuring plane contains a magnetic disk which can be attached to the surface to be measured. It is especially easy to measure helicopter pitch angle, miter saw bevel angle, automatic test and repair, etc. Features: Small and lightweight, it is convenient to carry Strong magnets built into the base secure the fixture to any iron surface The large EBTN (Enhanced Background Twisted Nematic) LCD screen greatly improves the reading experience, illuminated numbers and letters on a black background make it easy to read even in bright sunlight or low light. L screen will automatically invert when you lower your head. Auto shut off after 3 minutes of inactivity Specification: Range range: 4*90 (0- 360) Accuracy: +/- 0.1 degrees at 0 and 90 degrees and +/- 0.2 degrees at all others Resolution: 0.05 degrees Waterproof: IP54 Power supply: 2 AAA batteries (batteries included) Packaging we including: 1 digital level box 2 AAA batteries 1 carrying bag 1 user manual