This Blackmagic Design MultiView 4 HD unit doesn't come with a power supply. Please note there's a known issue: the HDMI output doesn't work.

Using this Blackmagic Design MultiView 4 HD is easy. But remember, you'll need to get your own power supply as it's not included. When you connect it to other devices, be aware that the HDMI output doesn't work, so you'll have to use other connection methods. As for maintenance, keep it in a clean and dry place. Regularly dust it off to keep it in good condition. Also, when you're not using it, unplug it to save energy and protect the unit.