Mouse Laser Level, Adheres To Any Surface For Hands Free Use, Super Stick Adhesive System Is Reusable, Sticks To Any Surface, & Leaves No Marks Or Holes, Projects A Laser Line Up To 30', Integrated Horizontal & Vertical Leveling Vials, Includes Reusable Super Stick Adhesive Strip, 2 "AA" Batteries, Instruction Sheet & Protective Carrying Pouch.