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Swimmer-saving Cap / Life and Safty

Swimmer-saving Cap

Swimmer-saving Cap is a life preserver for swimmer that makes swimmer can be seen in crowded swimming pool or seaside. If swimmer stays in water (never gets out from water) over 45 seconds, the water pressure will press the red liquid out. The signal will be sent and seen by lifeguard.
Then he/she can be saved.

University

Hunan University

Hunan University
Changsha, China

Fan Chen,
Hunan University