What is a 4k wallpaper
4k is type of display resolution. A 4k wallpaper is a very high-resolution image.
Technically, a 4k image has 3840 X 2160 pixels or 4096 X 2160 pixels which allow larger horizontal display resolution than any other resolution.
Difference between 4k and HD?
A 4k resolution image as 4 times more pixels than HD 1080p. But that doesn’t mean that you see an image that is four times superior.
The human eye can’t see that much pixels on a small size image, but when you have a bigger and larger screen than the difference is significant.
Installation
The installation of a live wallpaper is the same as a regular wallpaper. If you need help with the process you can go to these pages: