... office, gym, factory, school and university etc.Specifications:SpecificationP20Item 1 ---LED ChipBrandEpistar ,Opto , Cree , NichiaCountry of OriginTaiwan. United States. JapanSpan life100 ... Advantage:1.integrating graphic display and video display made of LED cabinets or LED dot matrix module.2.Synchronizing words,numbers, letters,symbols ...