Simply connect your HDMI sources to the k072c-001b HDMI 2-to-1 Switcher's inputs and your display to its output. It's that simple! The k072c-001b HDMI 2-to-1 Switcher requires no external power. An IR Extender is included for when your k072c-001b HDMI 2-to-1 Switcher is not in line of sight to your remote control.