High Efficiency Filter PCADR 500m³/h & FCADR 185m³/h, eliminate 99.97% of pet dander, dust, pollen, smoke, TVOC and fine particles as small as 0.3 microns((less than one percent of a hair diameter ).  To purify a room of 165㎡ only needs one hour. High-precision Sensors PM 2.5 & PM 10 sensors to detect air pollutantsOLED Touch Screen AQI displayed in real time Smart Control Voice command with Google assistant and Alexa Negative Ion Generator Helps promote air quality. Detachable Air Outlet Grille For easy cleanin Quiet Operation Noise as low as 33.7dB, just like whispering
High-precision Sensors: PM 2.5 & PM 10 sensors to
High Efficiency Filter: PCADR 500m³/h & FCADR 185m³/h, eliminate 99.97% of pet dander, dust, pollen, smoke, TVOC and fine particles as small as 0.3 microns((less than one percent of a hair diameter ).  To purify a room of 165㎡ only needs one hour.
OLED Touch Screen: Air quality index displayed in real time
Quiet Operation: Low noise 33.7dB in night mode, sleep undisturbed
Full-room purification in the time it takes to read a bedtime story
Xiaomi Smart Air Purifier 4 Pro has a Particle CADR of up to 500m³/h, and is able to release 8330L of clean air per minute. The purified air is able to reach every corner of your home, so you and your family can breathe safely all the time.
Intuitive display, easy-to-control interface
Intuitive indoor air-quality data with the real-time PM2.5/PM10 display and colour-coded light strip. Adjust your purification settings with the simple touch control buttons, one light touch to fulfil your air-quality needs.
99.97% elimination of 0.3μm particles*
The Xiaomi Smart Air Purifier 4 Pro features a three-in-one filter, including a primary filter, the Xiaomi's High Efficiency Filter and a high-quality activated carbon filter, which work together to purify your air and keep you healthy.*
*Claim is not Verified
Negative air ionization Stale-air elimination to keep your home fresh
Enhanced air purification with dust cleaning that will make you feel as though you're in the forest.
Smart control, Start your air purification anywhere anytime
Use the Mi Home/Xiaomi Home app to activate your air purifier on the move, so your home is fresh from the moment you arrive.