... .Square Laser Level 2. Square accuracy: +-0.5mm/m 3. Power: 3xAA alkaline batteries Five highly focused self-leveling laser beams provide ... Walls, Doors, Frames, Stud Beams, Windows and Skylights; Level Electrical Outlets; Stud and Curtain Wall Plumbing, HVAC, Plumbing ... SpecificationsLaser Line productDX-01 Building Measuring Equipment Laser wavelength: 635 nm Laser class: class IISquare accuracy: ±0.5 ...