odd, i read something about the same product yesturday, completely different. rather than a USB it was a small box with switch and what looked like a bit of copper pipe with some copper wire wrapped around.
amusingly i found disks for sale you can stick onto the back of your phone, to block 5G...
that doesnt seem well read up, rather vague. and incorrect, oxygen absorbs energy at 60GHz leading to high attenuation of signal (a few minutes reading to find that). the frequency cant just change if your antenna are not configured for that.
we're not using 60GHz though are we? what have you found the effects are on oxygen and why should that be a concern? and how can 5G be used in the wrong hands?
oh dear.
and the video of the engineer, if he doesnt usually open up kit, what does he know is usually on them? it looks dodgy anyway, very much like a satellite receiver connector not fibre or ethernet i'd expect in network equipment.
and lo, few minutes later find it is identified as...
this would be frequency band used for Wifi and telecoms point to point systems, and military radio in the past. its not very plausible that this range of frequencies have any negative affect or increase illness.
they never do, they'll just tell you to "do your own research".
as already noted, we dont actually have 5G here except a few city centres, and due to range of 5G it'll be very small areas active currently.