Dual or quad hdmi/dvi multiviewers
"Simultaneously display video from multiple sources on a single display"
The Dual & Quad Screen Multiviewers allow you to simultaneously display real-time HDMI/DVI video from two, three, or four different sources on a single monitor. They are capable of displaying the video sources in quad, PiP, full, or custom mode. In custom display mode, each of the quadrants can be adjusted to any size and positioned to any location on the display.