Television is the key to the outside world, so it makes sense that some prisons have begun adopting digital televisions in the cells of inmates in order to keep everyone happy. If prisoners are happy then they are not causing any trouble.
Video Game Consoles
There is only one thing that is better than a television, and that is a video game console to attach to it. Some prisoners are capable of completing Final Fantasy, which helps them relax and feel entertained through their stint.