StarTech.com USB 3.0 to HDMI Adapter - 4K 30Hz Ultra HD - DisplayLink Certified - USB Type-A to HDMI Display Adapter Converter for Monitor - External Video & Graphics Card - Mac & Windows (USB32HD4K)

Update: after a quick exchange with StarTech, audio is working, so 5 stars it is!I got this to be able to use my older laptop (2 years or so, still has USB3) with the new 4K TV I'm now using as my desktop monitor (to replace 3 24" LCD monitors). I already had a DisplayLink HD adaptor, so I knew they were OK. This 4K one also just worked for me, from a graphical point of view. I had to set my Samsung TV into "PC mode" to get some picture improvements (4:4:4 Chroma is what you want), but now it's nice and sharp. I was a bit concerned after reading other reviews about a 30Hz desktop, but for me at least, it's completely usable, including watching video on youtube.I don't get any audio though which is kind of a pain. It seems to support it - I get a DisplayLink Audio device as a selectable option - but I don't actually get any output. The TV side is fine, because the other attached PC is sending sound just fine. The controls for the device are a bit limited (a little right-click menu thingy in the systray) so there's not much to tweak, either.It'd be a 5-star device if I could get audio working, because it's saving me from either buying a new laptop, or dealing with multi-monitor hassle.

I got this for a HP Envy 13 laptop which is a couple of years old and doesn't support dual 4K screens - via a docking station I was able to get 1 4K screen and one HDMI screen.With this device I can get two 4K screens at 4K resolution with a 3rd HDMI resolution screen on the laptop itself - brilliant.Refresh rate is limited to 30Hz but for work use that's fine. I haven't tested it for gaming but that refresh rate will be a limitation so best to avoid if that's your requirement.Otherwise excellent!

I needed to connect a second external display to the M1 MacBook Pro and found this as an advised solution in a forum. As a long time Mac user, I am always a bit concerned if the offered Windows solution really works for Mac as well, but after downloading and installing the software driver, it immediately worked. Both HDMI screens are connected to the same USB-C hub. One to the HDMI port, the other one with the Startech adapter to an USB port of the hub. Works perfectly.

Sadly it does only 30Hz on 4K, but for browsing and watching Youtube is fine. I even manage to play few FPS on it, and although performance was not brilliant, I was impressed that it worked at all. Where it really shines is RTS.In general, great item, and does the job. I'm not sure if 30Hz is down to this item not being HDMI2.0 or my TV, but it works just fine.

Stunning bit of kit. I have a 40" Samsung 4k TV that I wanted to use as a 4K monitor. My current laptop could only go to 1920x1200 so rather than replace the laptop with a new laptop with a video card that can do 4K I decide to take a punt on this device.I connected this device this evening to a spare USB 3 slot on my laptop, driver was installed automatically, then connected a HDMI cable from this device to my 4K TV. Set input source to PC and voila, now using my laptop with a 4K 40" monitor. Default resolution 3840x2160 set automatically. I'm using 100% scaling and the real estate is massive. No noticeable input lag at all. I'm not using this for gaming obviously, just as a desktop to do development work on.I'm using the Samsung ue40mu6400 TV as a 40K monitor and works a dream in 4k using this external video card, the TV supports 4:4:4 chroma which is essential to use as a desktop, save £££s over a dedicated 4K monitor which have rip off prices.Highly recommended.

I am only using it at 1080p, but it works perfectly on my M1 MacBook Air.I didn’t use the supplied software, I’d already installed the latest DisplayLink Manager, and this unit worked first time just plugging it in.

I’ve got a 2012 MacBook Air 11” with macOS Catalina with an Ultrawide 2560x1080 monitor running via thunderbolt to hdmi, using SwitchResX to get the resolution supported. I wanted to run another identical monitor and was recommended this little adaptor to take care of the job. It works perfectly. I’ve now got 2x Ultrawide monitors at 2560x1080 resolution, along with the Mac’s own screen still in use. The install was a little finicky but following online instructions got everything working in the end. Highly recommended.

Terrible! Made my Sony TV flicker, loads of screen anomalies(flashing pixels), very sluggish and slow. Completely avoid this if you're intending to use it for any multimedia playback it's ridiculously laggy! I was trying to use this on an HP Elitebook, high spec, i7 cpu, loads of RAM, USB 3 etc but it was useless. Unless you're using it to view static photos or work on files and it doesn't make your screen flicker or produce faults, it's pretty much pointless for anything else. I used the same cable and connection from my PC to the same TV and it worked fine, that was outputting via a GTX1070 - i know they're leagues apart, but this should be able to product a steady screen without any faults and should manage basic video playback. I thought it was a big ask for 4k output and too good to be true and this was! Complete waste of time!