Square matrix trivision billboard 1.Full set digital control equipment 2.CE, ... control equipment2.Maintenance free3.CE,ISO9000,National Invention Patent Square matrix trivision billboard ,tri-vision display,trivision billboard, trivision board The ... .8-2.0mmWidth of triangle prism: 126mm×3 sides Square matrix trivision billboardImage flipping time : each face 6-12 seconds / customized ...