The Bosch GLL50-40G Green-Beam Self-Leveling 360 degree Cross-Line Laser uses green-beam technology, which emits green lines up to 4X brighter than standard red beams. This gives the laser a working range of up to 100 Ft. in diameter. The laser produces vertical line, 360 degree horizontal plane and cross-line modes, for a broad array of alignment and leveling applications. It provides 360 degree coverage to level with one setup point for an entire room. The tool has full rubber overmold housing, designed to be similar to a roll cage, so major impact points are reinforced with rubber. It has an IP64 rating and features deeply recessed windows help protect the laser glass. The one-button onboard user interface allows easy selection among the layout modes. The two-position recessed switch provides additional protection of the switch mechanism. The Bosch Smart Pendulum System self-levels and indicates out-of-level condition, and it locks the pendulum for secure transport. The included LB10 L-Bracket and DK10 ceiling clip offer quick setup and extra-strong magnets.