Description
Room air, measured and adjusted
The Mi Smart Air Purifier 4 combines a built-in electrostatic and activated carbon filter with Wi-Fi control so you can run, monitor, and tune purification from your phone or voice assistant.
Certified capture
TÜV Rheinland Allergy Care certification marks this unit as proven to filter allergens, pet hair, dust, smoke, and similar airborne matter. The integrated filter is rated to remove at least 99.97% of allergens.
Coverage and fan control
- Adjustable speed lets you trade noise for throughput.
- About 12 minutes to treat a small room; up to 517 sq ft in roughly 30 minutes.
Quiet use and display
- Built-in air quality sensing; air quality index shown in the app.
- Operation around 20 dB; listed as 33% quieter than typical purifiers in its class.
- Display brightness can be lowered or switched off for nighttime.
Connectivity and upkeep
- Wi-Fi pairing with Alexa and Google Assistant; fan speeds adjustable remotely.
- Filter lifespan viewable in the app; intended long-term use about 6–12 months before filter replacement.

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