Xiaomi Smart Air Purifier 4 Compact Filter

3-in-1 filter, Clean air output after layers of purification - The primary filter, Xiaomi's High Efficiency Filter and high-quality activated carbon filter work together to purify the air and keep it clean.

Primary Filter, 360° blocking large particles - The primary filter traps large particles such as dust, hair and fine chips, while at the same time being extremely durable because it is resistant to crease, oil and acids.

Xiaomi's High Efficiency Filter, Traps 99.97% 0.3μm particles - Filter out PM2.5, pollens, and other allergens, continuously producing clean air.

6–12 months long-lasting filter, for everyday freshness - Although the integrated filter is durable, its performance may gradually degrade over time. To produce the best results, replace the filter every 6–12 months.