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Fatigue Care connect the OBD with the back window of the car to show the time that this driver
has driven(by LED light on the back window), which enables the drivers that drive behind this c-
ar to know this driver's condition(tired or not).
The color of the light can show the condition of the driver, which enable other driver to konw mo-
re information about the driver drives in front of them.This design can not only effectively reduce
the potential risk, but also avoid car accidents.