The Bosch GLL 2-80 360° Dual-Plane Leveling and Alignment-Line Laser is great for laying out doors and windows or aligning pipes and conduit. It project two bright laser In. chalk lines In. in 360°, offering an easier-to-use solution than traditional rotary lasers. It uses Bosch's Smart Pendulum Leveling System that self-levels, indicates out-of-level and locks when switched off for safe transport. The laser has a Range up to 65 Ft. distance Once leveled, it is accurate to within 1/4 In. It includes a manual mode for all jobsite conditions. This laser offers a pulse laser mode, so if used with an optional laser receiver the laser is effective in bright light conditions or outdoors with a range extended to 265 Ft. The laser comes with a BM1 Positioning Device for trouble-free and quick set up.