Sort of! They don’t plug in or use batteries, but they do have an electrostatic charge which they use to catch small particles.
N95 and KN95 masks probably don’t work very well.
Why do you say this? For example, while microcovid is very negative on cloth and surgical masks they think N95 or similar are decent (and worth wearing if risk is not that high or you can’t get a better one): https://www.microcovid.org/blog/masks
Sort of! They don’t plug in or use batteries, but they do have an electrostatic charge which they use to catch small particles.
Why do you say this? For example, while microcovid is very negative on cloth and surgical masks they think N95 or similar are decent (and worth wearing if risk is not that high or you can’t get a better one): https://www.microcovid.org/blog/masks