This 3x1 HDMI Switch routes 4K Ultra HD video and digital audio from any one of the three sources to a display. The three inputs accommodate the connections of 3 HD video sources simultaneously, such as cable box, game, PC, or Blu-ray players. The output sends the HD audio/video signals to a HD display. Switching is done by push button on the unit or via the IR remote that's provided with the unit. It also automatically switches between sources when they are powered on and off. The IR remote has a memory button that automatically switches to the source saved into memory when TV is powered on. The black, silver trimmed, enclosure and small 4.61" x 2.52" x 0.98" (117 x 64 x 25 mm) foot print blends in with most home theater systems.