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A separate swimming ring / swimming ring

A separate swimming ring
A separate swimming ring

This product is suitable for children around 10 years old. By using this product and connecting with bluetooth of mobile phone when swimming, it is more convenient to control the distance between the swimming ring and the shore, so that parents do not have to accompany their children all the time and "free" their hands.

University

Zhejiang university of finance

Zhejiang university of finance
& economics dongfang college
Zhejiang , China

Yizhe He,
Zhejiang University of Finance & Economics Dongfang College

Junjie Fang,
Zhejiang University of Finance & Economics Dongfang College

Yuwei Mao,
Zhejiang University of Finance & Economics Dongfang College

ZeHao Lin,
Zhejiang University of Finance & Economics Dongfang College