Electronic compass
An electronic compass acts as a compass on a mobile phone. The electronic compass works based on the geomagnetic principle. The compass in a mobile phone can indicate the direction without GPS or network. It uses the electronic compass to identify the direction. The electronic compass is more practical on map navigation. When you open the map software, you can see a small arrow through GPS positioning. The arrow points to the moving direction during your moving process. The small arrow that can directly sense the direction is controlled by the electronic compass.
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