1. Small and light makes it convenient to carry. 2. Powerful built-in magnets on the base secure attachment to an iron surface. 3. Large digital LCD display with backlight. 4. Fast and accurate measurements. 5. Automatically shut down after 5 minutes of no operation. Size: about 57*57*30.5mm Angle Finder / Protractor provides fast and accurate measurement in woodworking, construction, machinery, telecommunications, automotive, etc. An additional LCD is convenient to read. Small and lightweight, it is real easy to carry and use. The measuring plane contains a disk magnet that can be attached to the surface to be measured. It is especially easy to measure the height of the helicopter, the angle of the miter saw, automobile test and repair, etc. Features: Measuring range: 4 * 90 (0-360 ) Accuracy: +/- 0.1 degrees at 0 and 90 degrees and 0.2 degrees the rest Resolution: 0.01 degree Waterproof: IP54 Power: 2 * AAA Battery (batteries not included) Delivery quantity: 1 piece