I use this wallpaper as the #27 of 49 Dragon Ball Z wallpapers. It's featured with a 3D picture of 4 Dragon Ball enemies in Dragon Ball series. From the left to right: Vegeta, Majin Buu, Freeza and Lord Beerus. Basically, Vegeta is the enemy of Son Goku in his first appearance, then he become the ally of Son Goku.
This picture is one of the high resolution wallpaper that you can get for free. It's better to download this picture in original size. So, you will get this file in 1920x1080 pixels resolution. This resolution also popular as HD resolution.
Furthermore, you can also collect all 49 wallpapers from this site by visiting our gallery below:
Dragon Ball Z Wallpaper (49 Pics)
Dragon Ball Z Wallpaper 27 of 49 - Four Enemies