BLUF: This is an excellent device for the money, and a good Swiss-army knife for a consultant or QA team to have around. It comes with all the cables, too, and they're not bad.I bought this to record workstation demos for clients; software-only recorders are not reliable under high CPU loads, and this will record independently to a MicroSD card (U3, V30 or better).I cannot find an English manual for this thing. There is a FAQ, but a proper manual is missing from both the box and the web site. This is important, because there are some "magic button" combos that you will have to figure out by trial and error without it-- including some very frustrating things like "headset mute".Some information you may find helpful:YES, it records HD (1920x1080) video at high framerates.NO, it will not record 4K video.YES, it will reliably run under power from a normal (500mA) USB-A port. (The manufacturer suggests bringing a USB power bank along if you're using a laptop, which is actually not a bad idea.)YES, it really will record totally independently of the host system; all it needs is power and an HDMI connection. There is a big glowing button you whack to start and stop it-- that's it.YES, it will also work as an OBS Studio device (one video capture device that also brings in audio; you don't need a separate audio connection).YES, it will record HDMI audio. However, the levels are a little low.YES, the headset jack is 4-position (TRRS) 3.5mm, supporting a microphone. If the mic doesn't seem to work, hold each of the volume buttons down for a few seconds until the mute clears.YES, you can hear the HDMI audio passthrough in the monitoring headset.YES, you can hear your own headset mic in the headset. It is, in my opinion, way too loud relative to the HDMI video, so you may want to move the boom out a bit.YES, there is a mode to use it as a glorified card reader. This was done so that you didn't need to load and unload cards all the time-- I suggest USING IT THAT WAY, and taping over the card slot once the card is installed.YES, there are some low-latency drivers available; NO, you don't have to use them. The issue is a little complicated; see the website.When used as a standalone capture device, the native format is ".MOV".The device is physically quite a bit smaller than I expected, and quite light. Build quality is good.Grab one. I couldn't find anything else that was even close for twice the price.