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Button Whistle / button with whistle

Button Whistle
Button Whistle

Lifesaving Whistle is crucial for rescuers to find the location of survivals under earthquake ruins. Nevertheless,people don't always carry a Lifesaving Whistle,but buttons.Whistle Button is the combination of whistle and button, which enable the survivals to call for help without carrying other devices.

University

Hubei University of Technology

Hubei University of Technology
Wuhan, China