The Makita SK105DZ 12V MAX CXT Lithium-Ion Self-Levelling Cross-Line Red Beam Laser gives the user a cordless solution for level, align, and plumb applications. Depending on ambient light in the working environment, the SK105DZ has a line visibility range up to 25m and is detectable up to 80m with a Makita Laser Detector (sold separately).The SK105DZ has a bright 635 nm class II red laser with +0.3 mm/m = +3.0 mm at 10m for best-in-class accuracy. The laser line fan length spans past the 90 degree position to provide 180 degree horizontal and 160 degree vertical lines for full reference line coverage. For increased efficiency, self-leveling line stability is achieved in up to 3 seconds for increased productivity.