1. 1V1H 2. Laser Level 3. CE 4. Customize design packing available Two Beam Laser Level-1V1H Laser Level Description:Laser wavelength: 635nmLaser class: Class IIAccuracy: ±3/8"/100ft ... and Align: Walls, Doors, Frames, Stud Beams, Windows and Skylights; Level Electrical Outlets; Stud and Curtain Wall Plumbing, HVAC, Plumbing, Pipe ...