The Digital level is a professional digital electronic spirit level (inclinometer) that enables the user to find & check level, plumb & angles in two ways: For quick reference use the sensitive horizontal & vertical bubble vials. For highly precise and easy work the unit features digital electronic display that provides vertical or horizontal angles. Accurate slope readings when required.The PROTRACTOR version also contains built in laser pointer for transferring levels. Built in magnets allow the instrument to be attached to a ferrous base for easy use. In addition, the metallic base allows the instrument to be used on any rough surface. The Dig level PRO versions also contain a Calibrate on Site function ensuring that your measurements are always accurate ? Astoundingly accurate.Digital Level ProtractorFEATURES:Used as level and protractorAluminum frameMagnetic bottom with V-groove for shaftsZero setting can be made on any plain surfacesButtons: ON/OFF, ZERO, HOLD (keep the reading)CR2032 batteryAutomatic power off SPECIFICATION:Range:0 ? 360? (90? x 4)Resolution:0. 1?(= 1.745 mm/m)Accuracy: ?0.2?