The LaserMouse laser level projects a laser line up to 30' and adheres to any surface for hands-free use. The integrated leveling vials show horizontal and vertical. Superstick adhesive system is reusable - sticks to any surface, and leaves no marks or holes. Ideal for aligning pictures, tiling and floor applications, and cabinet and shelf installation. Includes Superstick adhesive strip, 2 "AA" alkaline batteries, protective carrying pouch, and instruction manual.