It is a foldable light emitting products for the prevention of the second car, It is compact and stored in the interior of the vehicle, and can be easily installed on the roof or side of the vehicle in one-touch manner, Especially, it is a luminous system with excellent visibility, so that both men and women can watch the triangle sign and the warning light to warn of danger from every side of the day and night as well as day and night. Therefore, it is a patent-pending automobile product which is easy to prevent the accident by informing the user of the risk.