This is a decent little hub/multiport adapter. It works with either USB-C or thunderbolt, although for HDMI output you need thunderbolt, but everything else works via USB-C also.
HDMI output – works well when plugged into a thunderbolt 3 port and was tested up to 1440p resolutions. Playback of full-screen with audio over HDMI was smooth and without issue mostly. I did have some video drop outs during large file transfers on Linux, but this was inconsistent with it working fine other times and from what I can tell is most likely an issue with the linux drivers and/or firmware. HDMI output did not work from USB-C for me. The listing says it should provided that the USB port supports display output. The USB-C port that I tested with is normally used with a USB-C to HDMI adapter to provide a second external monitor and third screen overall on that machine, so not sure what the deal is here. That USB-C port can definitely do HDMI output, but did not seem to work with this multiport adapter. YMMV.
USB Transfer speeds were quite fast – especially when plugged into thunderbolt. I could actually get slightly faster transfers via the multiport adapter's USB 3 ports provided I was plugged into thunderbolt 3. Transfer rates from a USB-powered external HDD were right around 100MB/s whereas when plugged directly into my laptop's USB 3 ports they typically run closer to 95MB/s. Performance with the multiport adapter plugged into USB 3 were understandably slower at around 80MB/s, so clearly the adapter adds some overhead but still manages a reasonably quick transfer rate.
Similarly the GB ethernet port worked just fine. Transfer speeds were typical for my network at around 110MB/s – again, typical for my network using the built-in wired ethernet port.
Data transfers to SD/microSD cards works fine. Speeds aren't really relevant here since the card itself was the limiting factor for speed.
Running multiple interfaces in parallel also worked smoothly on thunderbolt. Full speed USB transfers with HDMI output and network activity on a thunderbolt connect worked smoothly. On USB-C, expect some limitation due to the speed limitations of the USB-C port you're plugged into, but otherwise work fine.
Power wise, I had it powering the HDMI output, plus an external USB-powered HDD plus mouse and keyboard and all worked fine with it only connected to thunderbolt and no additional power supplies.
The device itself seems fairly well built. The main body seems to be cast aluminium, so it should be pretty tough. The cable is about 1 foot long, which should be more than enough for a device like this.
So it seems like pretty good value if you're in the market for something like this, but bear in mind that if you really want that HDMI output and only have USB-C rather than thunderbolt, it might not work.
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