You simply need a pc/laptop that has an hdmi and USB port. Plugging it in is easy peasy with all the cables you might need right out of the box.
The item itself is a monitor so it has to be plugged in to a computer/pc. It doesn’t function on its own like an iPad. Naturally it doesn’t plug into other monitors.
If you want more than one monitor, it depends on how many Hdmi/DisplayPort your laptop/pc has.