Make 90 degrees beam on any surfaces, to install home decorations, woodworking decorations, tiles, etc.Perfect for a variety of uses, including flooring, tile layout, paneling, wallpapering.Perfect for woodworking, tiled or any other work that requires precise alignment. The angle of can be changed according to the angle scale.90 degree level provides accurate alignment of flat or straight. Product name:Level instrument Specification:Red light level Power supply:3 x AAA batteries (without batteries) Type:Vertical & Horizontal Lasers Model Number:right angle 90 degree square laser Measurement Model:2 lines Colour:Yellow Material:Plastic Package Contents: 1 * Level instrument Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.