EXCEL LED Indoor p1.2 High Definition LED Video Wall ‖4K Indoor LED Screen. Indoor LED Video Wall becomes more and more affordable for High Definition Small pixel pitch These Days. All because of China raw materials supply chain and the led chip packages workmanship very experienced. The prices rapidly come down. Recently Package technology developed from SMD to COB. So what is COB? COB is Chip on board. Instead of mount the led lamp on PCB board,the COB Directly mount the chip on the PCB board. This makes better heat dissipation,wider viewing angle,and better Color performance. COB highly reduced the dead pixel rate because of its high humidity proof ability and collision proof ability. For the group of people who were afraid of the fragility of small pixel pitch LED screen,now are going to buy it. That's why we have seen many places like Conference Room,Teaching Hall,Showroom,Monitoring rooms etc all installed with High Definition LED Video Wall like 4K resolution LED Video Wall,even 8K resolution LED Video Wall.