The indoor fixed LED screen is set up for capturing the audience's attention, will be placed on the wall playing the advertising image or videos, LED wall placed inside as a medium could be seen all around the shopping malls, museums and festive sites, accepted by the public, meaning the impression of the product or brand. In the statistics sheets of specifications we attached, we take the brightness as a parameter(> 800nits one parameter for inside LED display) being divided into five types: P2.5, P3, P4, P5, and P6, however, the "type" here is usually standing for the viewing distance at the optimal experience.