LV03 laser-level of a total of four functions: The first function: laser-level can measure whether the plane is uneven or hanging paintings, etc., LV03 laser level can play three lines: a word line, cross line line (also known as the angle line). The second function: the level of the-laser level of beads, can measure whether the level of horizontal, LV03-laser level also more than a 45 degree angle of the water droplets The third function: laser-level instrument with a ruler. (2.5 meters, with inch scale) The fourth function: LV03 laser-level instrument on the edge of the scale (15cm, 6 inches)