Customer Ratings & Reviews

When I first unboxed the Rocketfish 2-Output HDMI Splitter, I wasn’t expecting much — it’s a simple, compact black box with a single job. Still, the build felt solid and the setup looked easy: one HDMI input, two HDMI outputs, a power adapter, and a quick-start guide. No unnecessary extras, no software — just plug and play. Setup with PS5 and Gaming PC I tested it with both my PlayStation 5 and my gaming PC to see how it handled two demanding setups. With the PS5: I ran the HDMI output from the PS5 into the Rocketfish, then connected one output to my 4K HDR TV and the other to a secondary display. Right away, both screens lit up perfectly. No flicker, no handshake issues, and the HDR looked just as rich and colorful as a direct connection. Games like Spider-Man 2 and Horizon Forbidden West looked crisp and fluid at 4K 60 Hz. With my gaming PC: I connected my GPU’s HDMI out to the splitter and mirrored it to my main 4K monitor and a secondary monitor I use for streaming previews. The signal stayed sharp, with no visible lag or image degradation — even when running fast-paced titles like Call of Duty: Modern Warfare II. The splitter didn’t seem to introduce any noticeable delay, and the image quality remained consistent across both displays. Ease of Use and Build Quality Honestly, this is about as easy as it gets. Plug everything in, power it up, and you’re done. There’s no configuration menu or software setup — it just works. The device feels durable and well-made, with sturdy HDMI ports that hold cables securely. It doesn’t overheat, even after several hours of use. The power adapter is small enough to fit neatly behind your setup, and the overall footprint is minimal. Performance and Limitations This splitter supports up to 4K @ 60 Hz with HDR pass-through at 18 Gbps, which covers most gaming and entertainment needs. I didn’t notice any color drop-off, flickering, or quality loss during testing. That said, it’s built for duplication — not for extending your display. Both screens will show the same image. Also, if one display isn’t HDR-capable, the splitter may downscale both outputs to match the weaker signal. It’s also not intended for 120 Hz or 144 Hz setups, so if you’re gaming on a high-refresh monitor, you’ll hit its bandwidth ceiling. Final Thoughts For anyone looking to mirror a PS5 or PC display to two screens — like a TV and a monitor — the Rocketfish 2-Output Ultra HD HDMI Splitter is a reliable, no-nonsense solution. It keeps the image sharp, the setup simple, and the performance smooth. It’s not made for advanced multi-monitor configurations or high-refresh gaming, but for straightforward 4K HDR duplication, it nails it. I’ve kept it plugged into my setup ever since testing, and it’s worked flawlessly. Bottom line: Easy to use, great signal quality, and perfect for console or PC gamers who just want their display mirrored without the headache.

The product was great and it did exactly what it was supposedto.

I am now able to use my macmini with two monitors. I have to switch for camera preview and now I can still see my work instead of switching back and forth

Works as advertised, but extremely over-priced. I blame BB for not carrying less expensive options.

If you have 2 TVs with different HDMI protocols this will not work with out rebooting every day. You’ll need an EDID splitter for that.

I recently purchased the Rocketfish 2-Output 8K Ultra High-Speed HDMI 2.1 Splitter and it has been a flawless addition to my setup. I am using it to run a single HDMI 2.1 output from my console/AVR to both my 4K TV and a secondary 4K projector and it worked perfectly. It is plug-and-play and connected two displays with certified HDMI 2.1 cables, plugged in the power, and everything worked immediately and no extra configuration needed. There is no lag, no flicker, and no random signal drops as of now and switching between displays is instant and seamless. The picture quality is stunning. It supports up to 8K at 60Hz and 4K at higher refresh rates and delivering crisp, clean video with no visible loss in quality. HDR10 and Dolby Vision pass through without any issues, and games and movies both look fantastic. The build quality of this unit feels solid and well made, not cheap or flimsy. The compact size fits neatly behind my TV/receiver, and the indicator lights make it easy to see what’s active at a glance. Overall, this splitter has future-proofed for my home theater systems and saved me from constantly swapping HDMI cables between TV and Projector. If you have more than one display and want to keep full HDMI 2.1 features, this Rocketfish splitter is absolutely worth it.

I've been enjoying using the Rocketfish 2-Output 8K HDMI 2.1 Splitter (model RF-AV21SPLTR) and it’s been working really well. Setup was easy — just plug it in and go. I’ve tested it with my Xbox, a projector and a few different laptops. It performed well without any issues. The picture looks sharp on both screens, no lag or signal loss. I was a little worried about the splitter getting hot after extended use, however this wasnt a problem. I mainly use it to show the same thing on two displays, like gaming on one TV and mirroring it to another or running a laptop to a monitor and projector at the same time. The only thing to know is that it matches the lower resolution if you use two different screens, so both will run at that level. It’s a bit more expensive than the no-name splitters online, but its pretty solid and has been dependable. Overall, I’m really happy with it — it does exactly what it’s supposed to do and hasn’t given me a single issue. A few things to note: The convenience with this device it perfect. I'm guessing HDMI cables weren’t included in an attempt to keep the price down. It's important to note, this is SPLITTER not a SWITCH. 8k looks terrific however keep in mind that the resolution will default to the lower spec monitor if you have a combination of both.

This product truly was bad. I plugged everything properly and it didn’t allow for 4k it didn’t even support 1440p.

This is such a simple set up for anyone to use. The only con that comes to mind is that there is no HDMI cable included in the box. The other aspect to remember is that it is not a switch, which means the same content will be displayed on both the monitors. Like I said, the set up is easy. There is no app or software involved. Plug the mother cable into the Input HDMI port and then connect the monitors/tvs through the output ports. It says 8K at 60Hz so if you are into high speed gaming, this may not fit the bill but that should be a minority among minority of all users. In my case, I tried 4K streaming on two different monitors and it worked without any hiccups. I also experimented with two different Tvs and it worked flawlessly. Granted that all the monitors and TVs I used are not that old, but please check your own Tv's HDMI configuration as older sets may not work commensurately. There is a rubber pad that gives traction if you intend to keep it on your desk. That's about it. Buy this if you are a gamer or have a multi-monitor setup that you need to use for trading or anything else. Highly recommended.

I have a small office, where we want to have a TV (2 TV's total), 1 at each end of the conference room, so that people at each of the table can read what is on the screen closest to them. All going through a central HDMI port. This Rocketfish 2 Output HDMI controller does just that, What's great is it's super compact, lightweight, and was easy to install and mount using the included tape strips behind one TV, then we ran HDMI through the wall cavity to the second TV. I have been using this all day for presentations and there's no lag, stutter, or degradation in quality - which is impressive given the compact size. There's no real setup, just plug in and go. I was up and running in under 10min (we already had preinstalled the HDMI cable for the 2nd TV). FYI. This would also be perfect for bars where you want to push out the same sports game across multiple screens at your venue. Or a restaurant or small business where you want to have digital signage. BTW. This is not (just in case you're confused) a device for sharing multiple devices to 1 display (that's a different kind of splitter).

Simply put, the Rocketfish - 2-Output Ultra HD HDMI Splitter just does what it claims to do: takes one HDMI input and splits it into two identical outputs. The Ultra supports resolutions up to 8k (which I was not able to test since I don’t have 8k hardware). This means it’ll handle everything up to that. All-in-all it’s pretty straightforward. I think the key thing in considering the Rocketfish - 2-Output Ultra HD HDMI Splitter, is being sure you understand what it does - and does not - do. This will not e-x-t-e-n-d your computer screen onto a 2nd monitor. It will duplicate your computer screen on two monitors. Because of this, it’s vital that you’re clear on what you need this splitter for. Many use it for sending a TV or streaming signal to 2 monitors that are in separate locations in a family-room. Think of a group of friends and family watching the same sports games together. In those cases, you need to be aware of how long the cables will need to be to carry the signal between the two monitors (3 meters for 8k | 5 meters for 4k). I’ll be using the Rocketfish splitter to duplicate my laptop screen for some podcasts in which I’ll be recording myself next to one monitor, while using the 2nd for me to view while doing the presentation (on Keynote). This is exactly what I need. If you’re clear on what you need, you can’t go wrong with the Rocketfish - 2-Output Ultra HD HDMI Splitter.

I’ve been able to spend some time with the Rocketfish HDMI Splitter. I run a few events and have a need for this to allow me to have multiple viewing areas for screens. Whether is be an event for 200+ people in attendance or something at my house. I’m a gamer that likes to stream so this device makes it easy to just attach a capture device easily without have to disconnect the whole setup. It also helps for when I run tournaments. I’m a person that plays TCGs and have a streaming/recording setup so it allows for multiple viewing areas and also allow for multiple people see the monitor out. It has been very helpful for flexibility in setups. I hate never having enough outputs. But this allows for that flexibility and ability. It has been very helpful with my events. It has 8k ability which makes it even better for the future. I’m a fan of over spec as it allows it to do everything I need with ease rather than be hindered by hardware. It has HDMI 2.1 so this also allows for 4k 120fps for that buttery smooth gaming with not downside. Overall it is an event coordinator and streamers best friend.

I'm slowly setting up a studio to run a live stream, and I needed a way to split the controller the host uses to their display and a display in the "control room." I was running into output limitations, and things were starting to get frustrating because this seemed like a such a solveable problem. It seemed that way because it is a problem - and this splitter was such an obvious fix that it was almost laughable that I spent any time worried about it. The setup was no-frills, immediate function, and I now I have two snappy displays running without issue. This needs dedicated power, which can mean you might have to do a little planning about where it's placed - but it comes with its own six foot power cable and usb plug, which is a nice comprehensive inclusion (so many peripherials like this just kinda shrug and let you figure power out by yourself). But it supports wall mounting with clever keyholes in the housing, so that opens up options for physical setup. Note that this doesn't include HDMI cables, so that's another thing to plan ahead. But everything else is in the box and ready to go.

The Rocketfish 2 Output 8K HDMI 2.1 splitter works exactly as advertised on the box or on the website. It splits one HDMI 2.1 input into two outputs - but only at 60hz. When I first saw this splitter, I assumed that the stated 8K/60hz maximum was like most other HDMI 2.1 devices, and that it would also support 4K/120 or 1440p/240. Unfortunately, that doesn't seem to be the case, so that makes this inexpensive splitter a bit less useful than I'd hoped. However, It will still work exactly as advertised for what it promises on the box - a 4K Blu Ray player or streaming media device connected to an older audio receiver that doesn't support 4K/8K video. It's still great for my specific use case (connecting a PC to a 1440p/60hz monitor but routing audio via HDMI to an older audio receiver). It just doesn't seem to be a panacea for using a gaming console with an older audio receiver. What I found is that it only accepts 60hz signals at each resolution. My older audio receiver doesn't support 4K at all, nor does it support any PC resolutions, so this worked perfectly to allow me to run HDMI to my secondary monitor, split through the Rocketfish splitter, and have multichannel PCM or DD+/TrueHD running to my receiver. It would also work great with a 4K Roku or Fire Stick and an older receiver. I think it's an excellent value considering the low price, as long as you know the limitations.

Rocketfish is one of Best Buy's own brands.The brand was released a little over 20 years ago ,and has positioned itself as one of the highend brand names in electronic accessories.  This HDMI splitter is no exception to that reputation. It offers up to 8K resolution at 60Hz with HDR10 and Dolby Vision.   Keep in mind that those specs are only acheivable if your connected devices support that reolution and features. You also have to use at least HDMI 2.1 cables in the appropriate lengths to achieve this. For max resolution at 8K a cable of 9.82ft or less is needed. For 4K resolutions you can use up to a 16.4ft cable. When hooking up the splitter, I would suggest plugging in the power before making your HDMI connections. Then plugging in your source device. When it comes to the output devices, I would plug in the highest capable resolution device first, and then your other device. I noticed that when plugging in my lower resolution TV and then the 8K TV, that I was not getting a signal to my 8K TV. I just unplugged everything and then connected in the highest res to lowest res order and everything worked fine. This device is a plug and play device, so there are no settings or anything on the splitter that needs adjusting. If anyone is curious the device puts off very little heat. To control the outputing video signals you would just adjust the settings on your source device as needed, and then your output devices. The splitter itself is very light, but feels sturdy and can be mounted to a wall or placed just about anywhere. Double sided tape is included to help keep it in place. The picture quality to the connected devices looks just as good as the original, so absolutely no complaints on the quality or performance. I checked the resolution on the connected devices and the device capable, showed 8k at 60Hz with HDR 10. I have not experienced any disruptions in the signal since installing, nor have I experienced any delay in the signal or start up lag. While visually this does not appear to have any lag, I would not reccomend spitting video signals for competitive gaming. For general video gaming purposes this should work fine. Competitive video gamers might suffer at the max resolution because this is limited to 60Hz, where as most gaming monitors can reach much higher speeds to reduce lag. Overall this splitter works great for what it is intended for. Both the video quality and audio quality are excellent.

The Rocketfish 2-output Ultra HD HDMI Splitter is an excellent and straightforward device that does what is says it does - splitting an HDMI single into two HDMI signals. The device carries both audio and video through the splitter to the two devices that the signal is connected to. This device is ideal for use case where one needs to split a single source such as a DVD player, game console, or TV box to have the same output shared to two devices. The noted features of this device are: - Splits one HDMI Source to two HDMI Outputs - Compatible with resolutions up to 8K@60Hz - Rubber feet prevent scuffing of your desk or table. - Mounting keyholes to support flexible placement (wall mounting - screws not included) Additional specifications include: - HDR10 and Dolby Vision HDR compatible. - HDCP Compatibility: HDCP1.4, HDCP 2.2/2.3 - DTS HD, Dolby TrueHD lossless digital audio compatible. Included in the box: - HDMI Splitter - AC Adapter - 6 ft USB to USB-C Cable (for power adapter) - Quick Set up Guide (English and Spanish) My testing setup consisted of a Laptop with an HDMI output and two monitors with HDMI Inputs. Setup was quick and easy and consisted of connecting the laptop to the Input port of the splitter with an HDMI cable (not included) and the two monitors to the output ports of the splitter with an HDMI cable for each (not included) and then connecting the included power adapter and included USB cable to the splitter and plugging in the power adapter. Turning on the monitors and setting their input to the HDMI port resulted in each receiving the video and audio output from the laptop. A few notable items found in the user guide: - For 8K resolution support the HDMI cables should be HDMI 2.1 and be no more than 9.84 ft/ 3 m in length. - For 4K resolution support the HDMI cables should be HDMI 2.0 cables and be no more than 16.4 ft/ 5 m in length. - Actual output resolution is related to the host, display, cables and your HDMI splitter's configuration. From there is was use the laptop as normal with each monitor receiving a copy of the output. I could easily see this device being used to support trade show setups or other use cases where having mirrored output would be useful. I could also see this driving two television units for displaying video and/audio for sporting, religious, or community events.

The perfect solution for complicated tasks. Plug and play, that's how easy it is to use!