At the push of a button, measure angles in degrees, percent, and mm/m inclination. The measurement display shows values in 0.05°, 0.01°/IN/FT, 0.1°, 0.1%, or in 1.0 mm/m increments. Arrows on the display indicate the direction in which the Incli Tronic should be moved to reach the 0° or 90° position. By pressing the HOLD function button, the current measurement can be locked. Intermediate angles can be set as reference angles (0-point). Different beeping tones indicate approaching the horizontal and vertical from the left or right. Automatic shut-off after 6 minutes. Measurement accuracy in standard position and flip measurement for horizontal and vertical levels: 0.5 mm/m. Measurement accuracy for the electronic inclinometer: at 0° and 90° ± 0.05° / at 1° to 89° ± 0.2°. Battery: E-Block 9 Volt 6LR61, very long operating time due to large battery capacity! Optional with extra strong magnets.