P37.5 outdoor full color led sign 1,High brightness 2,Large viewing angle 3,Easy to maintenance 4,Waterproof , dustproof P37.5 outdoor full color led sign Advantages: 1,High brightness,adjustable,could be used in different environment;2,Splendid lighting unifortmity;3,Large viewing angle;elevation is 45°;4,Unique fabrication processing ,waterproof ,quakeproof,dustproof;5,Single light repairing ...