1. What are they?
2. This can be used for the computer and not just monitor right?
3. If my sick sister and I were in the same house with one monitor in one room and one different monitor in her bedroom, could we both “plug in” to the same screen to play various “one player games” each of us being played one?
4. If so, How can we do this and where can we get the materials? What’s the cost?