Qooltek Multi-purpose Laser LevelUse this Multipurpose Laser Level for hanging pictures, installing shelving,laying flooring, hanging wallpaper and more.The tape measure is an 9-foot measure that includes imperial and metric linear mures, with graduations down to 1/32? and 1mm. Laser Parameters: ? Laser light has an on/off power switch. ? Class IIIA laser product. ? This is a Class 3R laser product, Power output ? 1mW. ?Note: Laser Ranging Error,that is given as "+/-2mm at 10m and 25m". ?Note: If the laser is the Vertical Level or the Horizontal Level, you shouldn't adjust the Beam. Specifications: Product Size: 7.28 (L) x 2.5(W) x 1.1 (H) Inch Packaging Size: 8.27*3.15*1.57 Inch Color : Black Net Weight: 6.49oz Net Weight: 184g Package weight: 9.2oz Original box: YES Note: ?Laser radiation, avoid direct eye exposure! ?A laser device is not a toy and must not be allowed to fall into the hands of children. ?Misuse of the device can result in permanent eye damage. ?Any correction measures that are aimed at increasing the laser power are forbidden. ?The laser device does not contain any customer service components. ?Please do not open the housing as doing this would not cover the warranty. ?Categorized as a class IIIA laser, this laser level comes backed by a 2-year limited warranty.Note: ?Please press the key button when you pull out the measuring tape, it would make the measuring tape better and easier using.?Please loosen the key button to lock the reel when the measuring tape have been drawn out the length you wanted.Packaging content:1 x Screwdriver1 x Beam Adjusted Tool?1 x Level Laser (included:3 x AG 13 Button-Cells)Back up battery:3 x AG 13 Button-Cells