The 3x1 HDMI Switcher is a device designed to make it easier to manage multiple HDMI devices connected to a single HDMI-enabled display (TV, monitor, or projector). It allows you to connect up to three HDMI devices — such as a laptop, gaming console, Blu-ray player, or media streaming box — to a single HDMI port on your display. This is particularly useful in situations where your TV or monitor has limited HDMI ports but you have several devices that require HDMI input. The switcher’s main function is to switch between multiple HDMI inputs without the need to physically unplug and reconnect devices. Depending on the model, the switcher may feature automatic input switching, where it detects the active device and switches to that input automatically, or manual switching via a button on the switcher or a remote control. This gives users flexibility in controlling their input source.