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be Used for seeking help when meet with a mishap in the wild .the Hydrogen produced by the reaction of water with active metal can blow the balloon up, which drive the drift bottles up into the sky, so as to achieve the effect of issued a distress signal to the outside world.
The water injection switch can be opened by rotating the upper button,and then inject the water in through the injection nozzle. the water flowed into the reaction reacts to produce the hydrogen which is used to blowing up the balloon.
The distress leave their own distress information in the recording device , and the GPRS beneath will locate the distress exactly.
south china university of technolog
South China University of Technology