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We all like swimming in the sea at summer. But many people died of
drowning. Alert-wristband is designed for people who spend their time
on swimming. It can feel your pulse and transform it to electronic
message. Computer can receive this message to monitor weather tourists
are safe.And the light will shine when you swim to long. If someone is
in trouble, lifeguard will find you easily for its electronic signal.
Zhejiang Sci-Tec University