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

Works flawlessly

I can get 120hz from my PS5 to my monitor but it will not allow HDR, is there a way to do this with the switch settings?

I tried to use it to split 4K signals to feed into two of my 4K TVs from Apple TV. it would only support 1080P. I don't think it's the fault of this device, as HDMI is a two-way communication standard, the TV actually sends back information on the resolution it supports (EDID), and if you have two 4K TVs, even though it supports the same resolution it could be sending back conflicting information to Apple TV. Too bad I can't find a competitor product that supports it either. If anyone has any luck with splitting their 4K Dolby Vision Apple TV signal please let me know. (Both of my TVs support 4K Dolby Vision and it's tested without the splitter to work with the Apple TV.)