Description ?Laser Level Square an easy to use layout tool ?Projects horizontal and vertical laser "chalk lines" on surfaces ?Dual diodes for making 90 degrees laser beam on any surfaces ?Two suction cups allow the laser level square to be mounted onto the surfaces ?Ideal for a variety of uses, including flooring, tile layout, paneling, wallpapering, stenciling, wainscoting, finish carpentry, outlet and switch layout, wall stud layout and partition installation. Features ?Size :116x68x115mm ?Weight :0.8Kg ?Laser Wavelength :635nm ?Laser class:Class II ?Accuracy ????3/8 inch / 100ft(????1.5mm/5m) ?Self-Leveling Range ????4???? ?Power 3x AA alkaline ?Low Voltage Indication Power LED Flashing Note ?1. Plumb and Align: Walls, Doors, Frames, Stud Beams, Windows and Skylights; ?2.Level Electrical Outlets; Stud and Curtain Wall Plumbing, HVAC, Plumbing, Pipe Installation,etc. ?3. Easily Lay Out Right Angles; Establish Diagonals and Footings for Decks, Porches, and patios; Grade Determination; Dry Wall. Package Content ?1 x Laser Level Measurer ?Does not including 3xAA