5 construction languages - units of measure (degrees, percent, mm/m, in/ft in decimal, in/ft in fractional), Working range of angle measurement is 0 degrees to 182.5 degrees, Automatic digit inversion for overhead measurements, Laser beam for transfer of reference points, Push button calibration, Audible indicator at 0 degrees and 90 degrees, V-groove, Includes 40-6065 > 21" Magnetic digital level/angle locator with dot laser, 3 "AA" alkaline batteries, instruction manual, soft-sided pouch