Stabila 36572 72" Tech/Electronic IP65 Level at Nail Gun Depot. Electronic measuring technology, two digital displays, an audible inclination guide, IP 65 dust and waterproof housing, and removable shock-absorbing end caps with anti-slip wall grips are just some of the benefits this Stabila electronic level offers. Precise slope measurements as needed for ADA 4.8.2 handicap ramp compliance. Dual screens (Front & Top) allow easy viewing from any angle. Electronic displays illuminate for easy viewing in low light conditions, and includes 5 display modes (degrees in 1 or 2 decimal points, percent, feet & inches (rise/run) in decimal, feet & inches in fractions, and mm/m). Other features include instant measurement conversion to any scale (rise & run to degrees, degrees to percent, etc...), audible tones for sight free use, and one button calibration. Requires two AA batteries for operation.