When you buy a mini PC, you only get the mini PC, nothing else. You will need to buy a keyboard and mouse, a monitor to hook it up to, and speakers to get sound. Of course, those are the basic peripherals you will need, but you can go wild and get much more.  Whether you have a small area in your home, you need a multi-PC setup and don’t want two or three towers at your feet, or you have a ton of PCs in an office setting, removing the attached tower that comes with a standard desktop PC can free up a lot of space.