Synchronous Flashing Solar Led Road Stud For City Road. Blue Solar Road Stud For Port are a type of road studs, set along the road surface, used at night or in rainy or foggy weather, to indicate the direction of the road ahead, consisting of retro-reflective material, shell, solar panels, LED, control devices, with active light and passive reflective properties of visual guidance facilities, LED solar studs usually used in combination with
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