1)lightbar with LED display screen 2)Working voltage:DC12V/24V 3)Color:red,blue,amber,white 4) ... Materials:PC Lens,aluminum base 1)lightbar with LED display screen2)Working voltage:DC12V/24V3)Color:red,blue,amber,white4)Materials ... :PC Lens,aluminum baseStructure1. Information screen is composed of display,controller and ...