The Bosch GPL100-30G features a three-point, self-leveling laser with 1/8 in. accuracy at 30 Ft. for up/down plumb, align and level applications. This unit features green-beam technology, which is up to 4X brighter than standard red beams. It also has the Bosch-exclusive VisiMax technology, which delivers maximum beam brightness in most jobsite conditions. The unit includes point projection to the front, so it can be used in a variety of positions for flexibility on the job.