Pro 360 Digital Level Specifications include... 360° Measuring Range 0.1° Resolution Size: 6.0" x 1.2" x 2.3" H Weight: 10.2 oz Accuracy... + 0.1° -level +10° + 0.1° -plumb +10° + 0.2° -max error Multi-functional, Digital Level Protractor and Inclinometer. Instant LCD display of level, tilt, true vertical or any angle in between to highest accuracy, one tenth of a degree reading. Use upside down, display reverses to right side up. Deviation from the true plane is measurable through full 360° (4x90°). The High-impact machined aluminum frame houses a rugged electronic sensor, custom circuitry and the liquid crystal display. The top plate has V-groove for accurate registration on curved or cylindrical surfaces.