Wide measuring range - Measures slope angles of 4 x 90 (total 360) 4 strong built-in magnets: Magnetic base for attaching firmly to metal surfaces Backlight: Large, clear LCD display with backlight Abstract and relative measurement modes: You can place the meter on a zero reference surface to measure the relative angle, then it will give a result of the angle of inclination measured. With an absolute angle measurement, you can test if the work surface is level. Reading Always Up - Reading is always displayed upright even if the protractor is upside down Features: Strong magnetic base 4 x 90 measuring range (total 360) Degree and mm/m of slope in conversion Absolute and relative measurement modes Large, clear LCD display with backlight Vertical and horizontal spirit bubbles equipped Hold measured data Displayed readings stay upright for easy viewing from all angles One set included: 1 x Digital Inclinometer 1 x Instruction Manual 2 AAA Batteries Standard Factory Package Features: Measuring range: 4 x 90 Resolution: 0.1 Measuring accuracy: 0.2 Power supply: 2 x LR03 batteries 1 .5V (INCLUDED)