I am using SANC, is the product of Shenzhen Three Color Electronics Co. oc is the product of Edmund Overseas Limited, early Taiwan is a famous manufacturer, currently in Beijing, Shanghai, Dongguan and other cities have its industrial chain! Can be said to be domestic products! In many foreign countries have its sales network! But Edmund's product history to be long, high reputation! The quality of the monitor, by the product category is not much impact, the general service life of more than five years, well-maintained are useful for more than ten years! The same three-year warranty for both types of products, I believe that the manufacturer's confidence in their own products! However, the three-color relatively cheaper, after all, not as good as the old Edmund's sales base, so the three-color export more!