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Mountain climbers tend to prepare headlamps when they are walking at night. With the headlamp, they do not need to take the light with one hand and both their hands are available for other things. However, it is hard for headlamps to shine on the precise directions. In particular, people get lost more easily at night.
A compass is installed on the headlamp and the directions are projected to the ground for guiding the directions. It changes directions based on the correct aspects so that travelers can step toward the correct directions without checking their compass frequently.
New Taipei City, Taiwan