5 construction languages - units of measure (degrees, percent, mm/m, in/ft in decimal, in/ft in fractional) for overhead measurements, Push button calibration, Audible indicator for level 0 degrees and plumb 90 degrees, Working range 0 x 90 degrees, Accuracy +/- 0.1 degrees at 0 degrees, 90 degrees, 40-6060 Includes > 6" Magnetic digital level, 3 "AAA" alkaline batteries, instruction manual, soft-sided pouch