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Analyzing the past accidents occurred in the mountains, we found that the main cause of the accident is getting lost. It is a very wide range of search and rescue in the wilds, rescue workers must spend a lot of time and effort searching lost people. "Sos light" is a field emergency survival product, via the space foil helium balloon with red led, and a speaker recognition rate, it could
let searching people in the dark wilderness more quickly found. It is designed to make the search in the wild and can easily find the location of a lost person in a short time, shortening the rescue time and increasing the speed of the rescue.
National Yunlin University of Science and Technology