Review on Fosmon 3-Port HDMI 2.0 Auto Switch 4K 60Hz, 3x1 Switcher Automatic UHD 3D HDR Full HD 1080P 60Hz HDCP 2.2, HDMI Splitter Hub for Apple TV Roku Fire TV Stick HDTV PS4 Xbox One Chromecast 3 by Will Rahman

First I will start with the negatives as there are not many of them. In my experience, it does NOT support 4K HDR. I have a Samsung NU6900 4K HDR and was trying to run 4K with an Xbox One S. Nothing was displayed. I would have to switch my Xbox to 1080p to see anything. But even at 1080p when I try to run a newer game it turns the display off again. As a result, I can only use my Xbox as a DVD player when connected to this device. I tried plugging it directly into the TV's HDMI port and it worked fine, so I can confirm that it's an HDMI switch. Also, I've tried this with AND without the extra power, no luck anyway. The next downside is that the Xbox-only display randomly flickers to a black screen. Somewhere every 2-5 minutes. Nothing bad, but it definitely shouldn't happen. Otherwise there are many pluses. Without the extra power, I can easily run (non-4K) Fire Stick, Nintendo Switch, and Blu-Ray players. Auto-switching is a great feature, and it's very persistent. My son might be on his Nintendo Switch, turn it off and when I turn on the Blu-ray player it automatically switches to that input. Wonderful! Also, I've had it for a year now and still no problems. I can't test pure 4K as my TV supports 4K HDR, but I highly recommend this switch. 4K owners, proceed with a warning!