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A caution board is a universal emergency equipment of a car. It is a reflector made of plastic reflective materials and used when accidents happen. It can warn other drivers of an accident by using its reflective properties. However, this kind of equipment may not work in poor weather conditions. Thus, we have designed this product called" The windshield time". When a car accident happens, turn it on and place it behind the car. It will send out an electronic signal by Bluetooth. Cars approaching the spot will receive that signal, so that drivers can slow their cars down to avoid another accident.
Yudian Jin Qiyuan Jin Shuyi Wang Zhuoke Zheng