The Bosch GCL100-40G Factory Reconditioned Green Beam Self-Leveling Cross-Line Laser with Plumb Points uses green-beam technology, which emits green lines and points up to 4X brighter than standard red beams. This gives the laser a working range for the lines of up to 165 Ft. The laser produces vertical, horizontal, cross-line modes, as well as upward and downward green plumb points. The tool can project two lines independently or together, for a broad array of alignment and leveling applications. It includes Bosch-exclusive VisiMax™ technology, which monitors tool temperature and power consumption to deliver the brightest line for the job. The tool has full rubber overmold housing, designed to be similar to a roll cage, so every major impact point is reinforced with rubber. It is an IP64 rating, and features deeply recessed windows help protect the laser glass. The onboard user interface allows easy selection among the layout modes. The Bosch Smart Pendulum System self-levels and indicates out-of-level condition, and it locks the pendulum for secure transport. The included RM10 Rotating Mount offers quick setup, extra-strong magnets, and fine adjustment rotating nob.