Our technology is developing so fast that we nearly can't imagine. Take switch for example, we used old switches a few years ago, but now we are all eager to give HDMI switches a try.
According to producers' introduction, the 3×1 HDMI Switcher routes high definition video (in multiple resolutions up to 1080p) and digital audio from any one of the three sources to display unit. Three inputs accommodate the simultaneous connection of up to three high definition video sources, such as satellite systems, HD DVD, Blu-Ray Disc, and PS3. The output sends the high definition audio/video signals to a high definition display. Switching is done via the IR remote that is provided with the unit or on the unit itself. Now we see it is true advanced technology. I believe more and more people will like it. Now let's take a look at how it works: