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High speed sensing alarm device using the method of using speed sensor .Such as Microwave radar 、Sound waves to detect、 Laser detection Radar speed four methods to test speed. Dangerous speed distance is detected, the induction treatment center immediately. Dangerous speed sensors distance method, warning lights light up, warning traffic, and inform the user the coming of the danger. The user can according to dangerous vehicles bearing to bearing vibration sensors judgment.High speed sensing alarm device is mainly divided into two modes, a high-speed mode,the other one is low speed mode.