1. Red Line Laser Level 2. 4V1H1D 3. Easy to use 4. ... Walls, Doors, Frames, Stud Beams, Windows and Skylights; Level Electrical Outlets; Stud and Curtain Wall Plumbing, HVAC, Plumbing ... nameItem NumberFeatureTechnical SpecificationsLaser Line productSA-05Building Measuring Equipment Laser wavelength: 635nm Laser class: Class II Accuracy: ±1/4"/100ft ... Packing:Plastic box 4V1H1D Red line Laser Level