Review on 🌬️ Elechomes P1801 HEPA Air Purifier: Advanced 4-Stage Filtration, Auto Mode, Air Quality Sensor, Removes 99.97% Dust Smoke Pet Dander, Ideal for Home, Bedroom, Living Room - Portable and Efficient Solution by Samantha Cook

So far it works decent. The automatic setting switches between low and medium very often, probably because the quality is on the border between them. But it would be nice if there was a slight hysteresis at the transition so it wouldn't be that common. I don't really like the all-in-one filter cartridge. It would be nice if there was a pre-filter that could be easily removed and cleaned like other designs. Does not come with "1 replacement filter" as per product description. It only comes with the one that comes preinstalled in the device. A replacement filter is not available. When asked, the seller didn't provide any actual product that could be found, eventually responding that it was "temporarily out of stock".