1, absolutely - for the function, can be used directly on the battery without correction; 4, relative measurement and absolute-pair measurement conversion; 2, 360° measurement; 3, with numerical retention function; 5, when the level is inverted, the Angle reading of the liquid crystal display automatically turn upward, which is easy to read the Angle;, Weight: 0.70768386102 Pounds, Manufacturer: tiyao