1 .Five beam laser level 2. Easy to use, one people can ... Walls, Doors, Frames, Stud Beams, Windows and Skylights; Level Electrical Outlets; Stud and Curtain Wall Plumbing, HVAC, ... NumberFeatureTechnical SpecificationsLaser Line productSA-05 Building Measuring Equipment Laser wavelength: 635nm Laser class: Class II Accuracy: ±1/4"/100ft ... 0.95 kg Accessories: Battery. Normal Packing: Plastic box