You cannot tile a wall without Stanley Fatmax FMHT77598-1. With a cross line, a horizontal line and a vertical line you can be sure that all tiles are attached directly to the wall. The maximum range of the cross line is 30 meters. With only a horizontal or vertical line you can go even further with a range of 45 meters. The green laser color is more visible indoors than a red color. The laser is not suitable for outdoor use, since the green line is not visible here. The laser is self-leveling with a range of 4 degrees. This way your laser is automatically level. With the included holder you attach the laser to the wall, the ceiling or a pole. You move the laser from top to bottom and from left to right.