8K@60Hz HDMI Splitter 1 in 4 Out, HDMI 2.1 Splitter Supports 4K@120Hz, EDID, 48 Gbps, VRR, ALLM, 3D, HDR 10, HDCP2.3, Dolby Vision Atmos, Audio Extractor, NO ARC

I couldn't get it to work. I have an xbox series x running at 4k 120hz. My tv runs at 4k 120hz. i have a Philip Hue Sync box that only runs at 4k 60hz or 1080p at 120hz. if i connect the output to my hue, my xbox gets limited to 4k 60hz. the splitter is downscaling to the lowest supported resolution... because of this, i had to return the device sadly..........UPDATE: I'm updating my review to 5stars. Customer service reached out to me, which I did not expect. They were helpful, and the product itself works well as intended, a simple switch that duplicates/mirror the output at the lowest resolution of whatever your device is able to output. For me, since I had a lower end device, all my highend device also went down. This is understandable. I'm just blown away by the customer service. Since it was at my own fault for not understanding how the device works, I can't downstar for my lack of understanding or oversight.

The use case of a firestick going to a 1080p monitor should be entirely within this thing's wheelhouse, but it does not show a picture, even after returning for a replacement. Seemed to be a little dodgy as to whether it recognized input/output being plugged in, there are indicator lights which did not consistently light up - but it didn't work even when both were lit up.

So far all the computers I have tested work on this splitter.

Let's do the bad first - the "manual" is filled with typos - "ON" is listed in the entire matrix as "NO"? How does that happen? It has no power supply, only a USB connector, so you need a UBS power source. Out of the box it did not work even though according to the functionality matrix it should have. Eventually, I got it working just by trying a bunch of dip switch positions. But in the end, it works quite well with a Sony 4K and an LG 4K at 60hz. It actually works better than dual out of my other Marantz which would pause for long periods when one of the two displays was off and turned on. When the LG is off and I turn it on, with this device the video connects instantly. Like I said though, out of the box the video was odd - shifted down and zoomed in

Aisla con mucha fidelidad el sonido y repite con una nitidez notoria

Basically, the title says it all. The product claims VRR support, but if you're trying to split the output from a PC this would only be possible if the EDID tells the PC that VRR is possible. This product does not.I tried TV Copy mode, and all of the listed 4k 120 compatible modes. None of them allowed VRR to be enabled on the PC. This defeats the purpose of my use case, which was to have the same signal sent to two different LG C3 OLEDs, one 48" on my desk, and one 77" on the wall, so that I can play games on either one without using to unplug and plug in hdmi cables all the time.There was also weird behavior with the audio output. Both TVs have their own soundbar, but if I muted the soundbar on the 48", the 77" would also display the floating mute symbol on the screen even though the 77's soundbar was not muted and playing sound just fine.There's a small possibility that because my second output (the 77") was via a one-way optical hdmi cable, that this could have interfered with recognition of VRR support. But this seems unlikely because I use VRR with the cable when used on its own.I still gave it 2 stars since it does work well for HDR 4k 120hz if you don't need VRR.

Works flawlessly

Everything about this looks good on paper, and most things worked well as expected with a few exceptions. Ultimately I ended up returning this because I could not get VRR (variable refresh rate) to work on Xbox Series X , a must for me. No combination of dip switches (including "TV Copy mode " ) could change this outcome. I saw another reviewer mentioned that they had flickering issues which were solved using a higher wattage usb power supply. Tried a 5v 3 amp brick that works well for an overclocked raspberry pi, changed nothing for me sadly. Another issue I ran into was that 10 bit graphics would make this thing freak out and reset every 10 seconds or so. Only 10 bit caused this issue for me. Everything else worked as expected. Can confirm this this strips HDCP and should work with most if not all capture cards. All tests were done with only 1 monitor connected to ensure best odds of 10 bit or VRR working. Tried 3 different monitors and an LG oled tv , all same results. Perhaps manufacture will eventually push out an update resolving these issues