I have been using this, so its operation has been confirmed. Although the product does not come with an external power cable, I will include one. ■ Ultra-compact design that doesn't get in the way! An HDMI(R) switcher that switches video and audio from multiple HDMI devices and outputs them to a single TV. Features ■ This is an HDMI switcher that switches video and audio from multiple HDMI devices and outputs them to a single TV. ■ This product supports 1080p up to 2K (1920x1080) 60Hz and WUXGA (1920x1200) 60Hz. ■ If you are using a 4K (2160p) TV, please fix the output resolution of the device you are using to 2K (1080p). ■ Please note that it does not support resolutions exceeding 2K (1920x1080) or WUXGA (1920x1200), or refresh rates exceeding 60Hz, such as 120Hz, 165Hz, and 240Hz. ■ You can connect three HDMI devices such as HDD recorders, BD/DVD players, game consoles (PlayStation(R)4, Nintendo Switch(TM), etc.), and Chromecast. ■ Even if your TV doesn't have enough HDMI input terminals, you can use HDMI devices without having to change cables. ■ It can be used without an external power supply such as an AC adapter because it supplies power from the HDMI devices. ■ An external power port is provided to ensure stable operation even if the power supply from the HDMI devices is low. If necessary, supply power to the external power port (USB micro-B terminal) on the side of the main unit. (※USB cable and AC adapter are sold separately) ■ It has an automatic switching function that automatically connects when the connected HDMI device starts up. ■ *You can switch to a device that is already running by pressing the button on the top of the main unit. ■ Ultra-compact design that doesn't get in the way even when placed around the TV. ■ All HDMI cables can be wired in the same direction, allowing for neat and tidy wiring. ■ It has non-slip feet that allow you to securely fix the main unit in place. ■ It has an LED lamp that allows you to check the input status.