A double map that displays two different types of maps on one screen, a magnet map that always rotates northward when a button is pressed in response to geomagnetism, and a map that searches for a location by latitude and longitude. all over the world in a hybrid image of a map taken from the air, with the touch of a button. The storage device is very good, and it saves a considerable amount of events as text, organizes them neatly with the sorting function, and saves them for a long time. The computer enables continuous confirmation calculation with an emphasis on addition and subtraction. You can write in the space.
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