The Stabila 24-Inch TECH/Electronic IP65 Level makes accurate level and plumb checking easy. Two AA batteries power the Stabila 24-inch TECH Digital Electronic Levels components which can measure levels in a range of functions including degrees, percentage grade, and rise/run in both inches and metric. Stabila electronic levels include screens on both the top and side to make reading measurements easy whether youre working on a paving project on the ground or on a wall at eye height. Push-button illumination makes the screens easy to read in all conditions. The sound function also lets you hear when something is level by emitting a series of beeps which get faster as you approach the steady tone of a level surface. Calibrating the digital electronic level is quick and easy, and you can also set a reference point level for repetitive work at particular angles. This IP65-rated Stabila