An HDMI splitter splits one HDMI signal into several signals. That means you can connect a single HDMI output to multiple HDMI inputs. As a result, you can show the same images simultaneously on multiple screens in Full HD or Ultra HD, for example from a Blu-ray player or game console. You can choose between HDMI splitters with 2, 4, or 8 outputs. An HDMI splitter requires external power supply, so a power adapter is always included.