“Shanghai LONGJOIN” has been established for 20 years and is a professional enterprise that develops and produces intelligent light controllers. At present, it is the world leader in the industry. It has been listed in the “New OTC(Over the Counter) Market”. Its products are sold all over the world, the market share in North American market is about 60%. It is also the designated brand for famous lighting giants PHILIPS, GE, CREE, EATON, COOPER, etc.