Warning. Red and blue double-pointed solar flashing lights are placed in front of highway maintenance operations to remind drivers to drive carefully. Installed in the dangerous area with traffic safety hazards on the expressway, reminding drivers or pedestrians to pay attention can effectively play a warning role and avoid traffic accidents and accidents. Flash, also known as strong point, adopts electronic means (such as programming ic with capacitor single chip microcomputer, etc. ) make the light source blink slowly or quickly to play a warning role.