CST/berger CL10 Self Leveling 360-Degree Cross Laser 360-Degree Horizontal Laser - Provides full room leveling coverage 120-dgree Vertical Laser - Projects along floor, up the wall and across the ceiling for perfect alignment 3-Mode Projection - Choose between horizontal, vertical or cross line modes Lock Mode - Allows user to manually control laser for angled installation (ie aligning staircase railings) Convenient Multi-Mount - Increases job-site versatility with height adjustment, wall mount function and 1/4-20 tripod thread Class IIa laser product, &lt;1mW power output