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This item comes very handy when someone gets isolated in a building and needs help from others at the time of disaster.
When you blow it, it makes a sound like a flute through a hole on the upside, at the same time, a fan inside gets spun charging a battery to use it as a flashlight.
This can be very useful because not only it can be used as a flashlight but it can also be used to signal one's location to the others.