1.indoor led display aluminum light box 2.led brightness light source 3.low power,long lifespan 4.double or single view sid Outdoor waterproof slim light box series.Features:* Aluminum outer frame, delicate,patable*Delicate,utility,easy for picture changing,convenient for maintennance*Snape open,easy for picture changing*LED light source,more energy-saving,more safety*Application : hotel,photo ...