Xiaomi Mi AirPOP PM2.5 Anti-Pollution mask can effectively block 0.3-micron particles and Xiaomi claims that it has PM2.5 filtration efficiency as high as 99.97 percent.
from Top Tech News- News18.com http://bit.ly/2BXFuZL
from Top Tech News- News18.com http://bit.ly/2BXFuZL
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