In recent years, global climate anomalies, typhoon??rains caused rivers soaring. People living near rivers miserable. The alarm can alert when the river reaches dangerous level via GSM SMS??So people and relief units could be strain early, reduce stress and catastrophe losses. The one benefit of using this system is the wide range, whether at home or go out ??people could get a warning, and it can work when power or telephone out of work.
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