They took it during the smog in Hong Kong. The smell doesn't really kill. The pollution value showed only 40, so apparently the smog was not so harmful. If you blow with an IQOS, it shows ~ 300. The device is almost always turned on in automatic mode: if there is pollution, it starts to make noise and clean the air. Didn't notice a big difference. From useful: gets rid of the smell of burning in the kitchen and the smell of aikos.
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