multipurpose laser level laser line 8ft tape measure tape ruler adjusted standard and metric rulers level measuring instruments

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