4K HDMI Multiviewer 4X1 with IR Remote 4 Channels Screen Divider 4HDMI Input 1 Output Seamless Switch Supports 4K@60Hz(YUV)/4K@30Hz(RGB)/1080P Full HD HDCP1.4 5 View Modes 1×1 2×2 1＋3 etc

The SIGRAPID 9x2 HDMI Multiviewer has been a revelation. The ability to display up to nine different inputs simultaneously on two separate screens is incredibly useful. I'm using it to monitor security cameras in one room and gaming consoles in another. Setup was straightforward, and the seamless switching between modes is as advertised – truly smooth. The picture-in-picture functionality is a nice bonus. I appreciate the variety of viewing modes available; there's a configuration for almost any need. While it supports 4K, it's only at 30Hz with RGB, and HDCP 1.4 which is a bit of a limitation for newer devices that support higher refresh rates and HDCP 2.2. However, for my current setup, it works perfectly. This is a fantastic product that delivers on its promises. If you need to monitor multiple HDMI sources, this is a must-have.

This is an HDMI quad display matrix controller. It combines 4 HDMI inputs into a single screen. It provides four equal size images from the HDMI inputs or several variations of one large image and 3 small images or a full screen display. The unit is controlled by a button on the from of the device or by an Infrared remote control. The unit requires a power source which is supplied via a USB-C port, with a USB-A to USB-C cable and a 5V 2.1A USB-A charger cube. Display quality is very good. Output Image quality does not seem to be degraded from the original HDMI input. There is no perceptible image lag.

I've only been using this multiviewer for a few days, so my opinion may change, but right now, I am satisfied. The unit is well made. No low quality plastic or wide open seams. The ports are all labeled for easy setup. Image quality is good. If it is not 4K, it is hard to tell the difference with the casual naked eye. Latency is a non-issue. I have not had a single instance of connection problems or signal loss thus far.

First off: This does what it says it does, and it does it well. Different signals, both 1080p (camcorder) and 4k AppleTV box (to 4K HD TV) were output to this device. It was fast with display after plugging in, and the image/sound was clear. It also doesnt seem to suffer from plug-in order of inputs like so many of these switch/splitter like devices do. You can also choose to downgrade a 4k signal to 1080p ****edit**** When coming back after 24 hours, the sound output from my apple tv was no longer passing through. I had video, but no sound. Had to unplug and replug the multiplyer to get sound back. So, with the aspect ratio issues (discussed after edit) and now the sound issue, I have to drop my review from 4 stars to 3. Sorry guys (developers), fix these two issues, and this is a four. Add picture in picture and make the remote sensible, and you have a 5 star. Back to the drawing board. ****end edit**** CONS -However, areas where this doesn't perform well is aspect ratio. I have no control over ratio it seems, and the instructions give next to no guidance on the operation of this device. For whatever reason, it will squish or stretch your image out depending on how you have it placed on the screen. This seems to impact the primary image mostly. -The remote is confusing. It is nice you can move other inputs into the primary position, but the remote and actual switches on the device are so convoluted, it leaves you to trial and error. PROS -My LG TV has some builtin functionality to do the same thing as this Multiviewer, but it is hit and miss and slow. For whatever reason, the LG only works in specific input video combinations, and struggles with hi resolution. If it doesnt like the input combination, it just refuses to show the image(s). Black screen on one or both images. And you only get two multiviews. This Multiviewer is much more reliable and faster. However, the LG did maintain correct aspect ratios. -Fast input response without issues with input order -Clear picture and sound -downgrade a 4k signal to 1080p -Dont need 4 inputs plugged in. Manual says you will get colour bars if no signal, but this is not actually the case. No signal, no output box on screen at all. Thoughts: So this isnt an advertised feature, so no points off. But if I was to actually pay for a device like this, I would like some picture-in-picture options. This doesn't seem to do picture in picture at all, so you will never be able to maximize the main input while showing 1 or more of the other inputs. But at least you can make any input full screen. Although again, that is confusing on the remote to figure out (simply the 1,2,3,4 buttons. They take up a lot of space on the remote and that's all they seem to do).

Does not work at all. Powers on and shows which inputs are connected but does not send any signal on the HDMI output. Very disappointed.