The stanley digital levels is highly accurate measuring to the nearest 010 degrees at level and plumb it has 3 vials horizontal vertical and the digital vial a buzzer sounds at 0 45 and 90the lcd screen features 180 readout where the display flips in the upside down position to enable easier reading the level has a recalibration function allowing a false zero a hold function and a mode function it is able to measure in degrees percentage and mmm it has 2 milled surfaces and a magnetic base