Your māoï is normally delivered with a factory-calibrated compass. However, you can recalibrate it by entering the māoï setup menu.
When starting the calibration procedure (see instruction manual), you must turn quickly your māoï many times on itself. It is important to make it rotate on all its axes (X, Y and Z).
After one minute, a message appears on the buddy display: "Calibration Success" or "Not enough data". If this second message is displayed, it is because the māoï has not done enough turns on at least one of the three axes.