... . CE 4. Customize design packing available 2V1H Self-levling cross line laser level (2D) Description:Laser wavelength: 635nmLaser class: Class IIAccuracy: ±1 ... and Align: Walls, Doors, Frames, Stud Beams, Windows and Skylights; Level Electrical Outlets; Stud and Curtain Wall Plumbing, HVAC, Plumbing, Pipe ...