Took apart said appliance and found a mic. Don't know much about air purifiers, but know there's no reason for it to have a mic. Mom put these around my house like crazy, but 100% she didn't plant mics in it, she's not petty or smart enough for that. Further research on the product said that it breaks down O3 and bacteria at a molecular level, but seems literally impossible since it has no fans and nothing high tech enough to do what it says. Seems like a scam, but still really concerned about the mic since there's so many in my house now. This is the manual/product description for the chip that the mic is connected to
https://www.ti.com/lit/ds/symlink/ne555.pdf I can't understand it but maybe someone else can
