- An acoustic signal is sounded at 0°, 45°, 90°, 135° and 180° as an aid to ease the alignment of objects. – Angles can be transferred in reference mode. \n- The flip-display feature changes the display automatically when making overhead measurements.\n- Calibration function to recalibrate the sensor and increase the measuring accuracy \n- Powerful adhesion magnets and additional vertical and horizontal vial, illuminated display \n- Hold function