Self Leveling Laser - 4d Laser LevelSelf Leveling Laser 4d Laser Level This Self Leveling Laser can rotate through a full 360 degrees to cover floor, ceiling, and all walls of a room at the same time. Laser lines intersect at 90 degrees to provide completely square angles on all surfaces. Each line can be displayed independently for a custom full room layout. The self leveling feature ensures a level line display throughout the entire desired layout. The unit is waterproof, dustproof,