The laser mouse is designed for use in aligning pictures, tiles and floors, cabinets and shelf installation. Accuracy of + or - 1/2 inch in 20 feet. Mouse laser level, adheres to any surface for hands free use, super stick adhesive system is reusable, sticks to any surface, and leaves no marks or holes, projects a laser line up to 30 foot, integrated horizontal and vertical leveling vials, includes reusable super stick adhesive strip, instruction sheet and protective carrying pouch.