The surface of PCB is painted with three-proofing lacquer, which can form a protective film, dust-proof,moisture-proof, corrosion-proof, and protect PCB from malfunction, prolong its lifespan.Module, receiving cards and power supplies can be maintained front, no maintenance channels needed.Ready-made brackets, ensuring the whole screen flat and seamless; Just 4 steps can finish the installation.Die casting aluminum cabinet, only 6.8kgs and 7.5cm thickness, sawving structure and installation cost.