Ionizer--probably unicorn shit.
The UV-C one? Probably real--and note it's the one labeled as "Verified by third parties". Moving air at some reasonable rate past a strong UV-C source really will sterilize it against a lot of stuff.
The UV-C one? Probably real--and note it's the one labeled as "Verified by third parties". Moving air at some reasonable rate past a strong UV-C source really will sterilize it against a lot of stuff.
Just because something is easily replicated doesn't mean I want to spend the time doing it.
And, as a side note, I suspect you underestimate the engineering behind those fans. Making a large fan which doesn't vibrate or make annoying noise is non-trivial.