For outdoor led fixed installation display product, Aluminum material is more durable and stable then traditional steel, the module uses aluminum alloy back shell and power supply uses aluminum power box to quicken the heat dissipation, and to make the electronic components can be cooled down fast without fans, which give the screen a longer life span and make sure noise-free. For indoor led fixed installation display product using High-precision aluminum alloy die-casting connecting plate, the screen is installed with higher flatness and stability.