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We carry with keys all day long.
1.lifesaving use. We can save our lives by sending infrared laser light when trapped in a disaster. for example, people who are covered by earthquake debris can use the lifesaving key to project laser light beam that pass through the debris. In this way, hundreds of thousands of lives can be discovered and saved.
2.daily use. According to our life experience, it is quite difficult to open the door when light is dark. This design solved the problem.
Huazhong University Of Science &Technology
Huazhong University of Science&Tech
Wuhan. Hubei, China
Zhi-wei Mu, Si-qian He, Ning-ning Zhu, Ya-kun Zhang, Chen Chen