Xiaomi Smart Air Purifier 4 Compact Filter

for a much cleaner air output. This filtration system consists of a primary filter, Xiaomiâs high-efficiency filter and a high-quality activated carbon filter that work together to purify your air and keep you healthy. Designed purely for the Xiaomi Smart Air Purifier 4 Compact, this replacement filter helps bring new life into your Xiaomi Air Purifier. The primary filter allows for 360° blocking of large particles. It provides an initial filtration by filtering dust, hair, and fine crumbs among other large particles and is resistant to creases, oil, acids, alkalis and more to ensure long service life. It does this thanks to a high-efficiency filtration system that can remove up to 99.97 percent of particles as small as 0.3 microns. In addition, the high-efficiency filter removes PM2.5, pollen, pet dander and other allergens.