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Nice one, seems that brand features fairly heavily on ebay. It says the image compression is lossless, but it still compresses before sending right?
Polygon-
None of these boxes will be truly lossless; note they state ‘visually lossless’ which is a nebulous and meaningless term.
An uncompressed 4K@60Hz 4:4:4 signal needs 12Gb/s, and the signalling rate of the HDBase-T over CAT6A interface of that AV Access box I linked to above is 10Gb/s, and it’s simultaneously sending 480Gb/s of USB2.0, audio etc down that same interface as well. The video is compressed, it is lossy, but for most purposes it’s difficult to tell.
ectoplasmosis
I use these for work:
https://www.amazon.co.uk/HDMI2-0-Extender-Keyboard-Access-Extension/dp/B0876TTMJR/
They’re more expensive than the average Amazon trash, but they’re rock solid, pass everything, and the compression isn’t obvious. Work as well as proper KVM boxes from Adderlink etc that cost 3/4x as much.