Handy and compact laser level toolWhich that can generates two lines on the floor, wall or other surface at 90 degree angles to help you square, align and angle at 90 degrees for surface layout including tile, picture, stone, brick, carpet, hardwood flooring and more Double Bubble- A double leveling bubble and a laser level to provide accurate alignment of flat or straight Simple one buttonone button operation powers two perpendicular lines (90 degrees) on and off, Class IIIa Laser product, Max output: <5mW Two suction cupsTwo suction cups allow the level square to be mounted onto the smooth surfaces(like clean glass and ceramic tile) alignment guide for 90-degree layout-calculate and turning angles in 5-degree increments ProfessionalProjects horizontal and vertical chalk lines on any surface up to 52ft(16m). Provides precision and accuracy to within Specifications: Material: ABS Color:yellow Size(L*W*H):190*134*45mm Wave length: 630-670nm Power output max 5mw ; Accuracy: 1mm/3m Available distance: 5m / 16m Battery type: 3*AA batteries(Not included) Operation temperature: -10~50 Applications: make 90 degrees laser beam on any surfaces, to install home decorations, woodworking decorations, tiles and draw lines