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GPS Wristband tickets / product

GPS Wristband tickets

Children are easy cttracted by amusing things when they are playing in the
amusement park,If we can make use of the ring type tickets toget a fix on the
children,as long as the children go beyond parent’s monitering scope,the phone
will vibrate

University

Shandong University.

Shandong University.
China.
Ji'nan, China

Gen Li,
Shandong University.

Lian Cui,
Shandong University.

Zezhong Dai,
Shandong University.

Yuke Yan,
Shandong University.