An HDMI splitter is a device that allows you to connect one HDMI source, like a Blu-ray player or gaming console, to multiple displays, such as TVs or monitors. This means you can share the same video and audio signal across different screens without needing multiple sources. Typically, an HDMI splitter has one input port and two or more output ports. It ensures that the quality of the signal remains high, allowing you to enjoy the same content on different displays simultaneously. This is useful for presentations, gaming setups, or home entertainment systems.