Solution:
4K resolution is an emerging standard for the resolution of digital movies and digital content. The 4K resolution is about 4,000 pixels, and common 4K resolutions are 3840×2160 and 4096×2160. Compared with 1080P, 4K resolution greatly improves the image fineness performance.
For example, Xiaomi box and TV support the output of 3840×2160 and 4096×2160 two specifications and resolutions. Users can adjust the supported resolutions in the box and TV Settings according to the support of the display device.