Depending on the needs of each LED display projects, such as the choice of pixels pitch, resolution, price, playback content, display life, and front or rear maintenance, there will be different trade-offs. Of course, we must also consider the external conditions such as the load-bearing capacity of the installation site, the brightness around the installation site, the viewing distance and viewing angle of the audience, the weather and climate conditions of the installation site, whether it is rain-proof, whether it is ventilated and heat-dissipated. So how to purchase LED display?