Xiaomi Smart Air Purifier 4 adds negative air ionization that you

Science continues to debate the need for negative ions in indoor air purification systems, but we find that air cleaning works as well with Xiaomi’s latest air purifier when the ions are turned off

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Xiaomi Smart Air Purifier 4 White

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Xiaomi Smart Air Purifier 4 White

Xiaomi Air Purifier 4 Pro

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