Convenient and compact laser level tool: which can generate two lines on the floor, wall or any other surface at 90 degree angles to help you align, align and tilt 90 degrees for surface layout , including tile, picture, stone, brick, carpet, parquet and more Double Bubble- A double leveling bubble and laser level to provide precise alignment of flat surfaces or lines Simple one buttonone button powers two perpendicular lines (90 degrees) on and off, Class IIIa laser product, maximum output: ProfessionalProjects horizontal and vertical chalk lines on any surface jus only 52 feet (16 m). Provides precision and accuracy indoors Specifications: Material: ABS Color: Yellow Size (L*W* H):190*134*45mm Wavelength: 630-670nm Max output power 5mw; Accuracy: 1mm / 3m Available distance: 5m / 16m Battery type: 3 AA batteries (not included) Temperature Operation: -10~50 Applications: Make a 90 degree laser beam on any surface, for installing home decorations, woodworking decorations, tiles and drawing lines