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Drowning accidents occur due to delaying rescue in every year. Especially It is difficult to rescue the drowning man at night owing to the sight restriction of rescue workers. So I suggest Trace ball, spread on the water in volume, and identify location of subject. This small ball will bring amazing help to rescue invaluable lives.
Usage is simple. When you fall into the water, you grab one of the many glowing trace balls. Then the trace ball will bulge like a tube and the size of the light will increase. Since you can be rescued faster through light and GPS.
pohang, South Korea
young gyu kwon,