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Touch Botton / Telecommunication

Touch Botton

Every time after power off all don't know whether the switch is closed, also did not wake up the next day, by the light. This product is to remind you that the bulge is the power of open cavity is power off.

University

Chengdu University of Technology

Chengdu University of Technology
Chengdu, China

Yan Xu,
Chengdu University of Technology