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The bracelets wore by the swimmers have wireless radios. Once there is an emergency, the swimmer just needs to try his best to drag the bracelet, and the bracelet will transmit a signal when suffering a shock, which will be in response by the infrared sensor and get the drowning person positioned. In this way, the lifeguard can easily position the drowning person and save him or her in time, and that can reduce the number of casualties.
Yang, Qiying
Guangzhou China, China
Yang, Qiying
Guangzhou China, China
Yang, Qiying
Guangzhou China, China
Yanglong /Wang
Yinghuang /Luo
Qiying /Yang
Yadan /Han
Yang, Qiying
Guangzhou China, China