Electric Face Masks

[dr. d]

I am beginning to see a number of people wear masks that are solid plastic with lots of small vent holes in the middle. These are definitely not surgical masks or cloth masks or copper masks.

I wonder if these are electric face masks

as i understand, some are, some aren't.
if we peruse lazada, we will find that there is a wide variety of masks for sale. some are electric, while others are not.
but do they work as advertised? meaning, do they filter out viruses and such? or, pang pintor ng kotse lang ba sila?
"I don't know."
it's common knowledge, "they might promise the moon and the stars, but in truth can't even deliver a handful of palay".