This multi-function door light bar is divided into red and white light. When the door is opened, the white part is always on and the red part flashes to warn the car of a rear-end collision. The light bar is easy to install, as long as it does not damage the original car circuit, it will not break. To use the upgraded 3M adhesive, just stick it on the door and connect the positive and negative power. I love its variety of designs!
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