Product Description: -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. -DIMENSIONS (L X W X H):150 X 73 X 50MM -WAVELENGTH: 630-670NM -POWER OUTPUT:<5MW -ACCURACY: ±1MM/3M -AVAILABLE DISTANCE: 16M -BATTERY TYPE: 3 AAA1.5V BATTERIES(NOT INCLUDED) -OPERATION TEMPERATURE: -10~50℃ -APPLICATIONS: Rangwell 90 DEGREES LASER BEAM ON ANY SURFACES, TO INSTALL HOME DECORATIONS, WOODWORKING DECORATIONS, TILES AND DRAW BEELINES PACKAGE INCLUDES: SQUARE LASER LEVEL X 1