3-Port HDMI Switchers

Switching Mechanism:

The switcher allows you to select which input source you want to send to the output. This can be done manually using a physical button on the switcher, a remote control, or automatically if the switcher supports automatic switching based on the active input.
Power:

HDMI switchers may be powered through an external power adapter or may draw power from the HDMI sources themselves. The power is necessary to operate the switching mechanism and sometimes for additional features.
Additional Features:

Some HDMI switchers come with additional features like remote control, picture-in-picture, or support for advanced video and audio formats.