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When driving, there is visually dead angle at the inclined rear side on both left and right sides, which may cause accidents when cars are making a turn or when drivers or passengers are opening car doors.
The Double J Light is installed on the edge of the handlebar of the doors. The two projection lamps in the shape of double J can warn vehicles behind, thus ensuring safety when the car is making a turn or when drivers or passengers are opening car doors.
Shih-Sheng Chen Iu-Ru Lai