Breathe clean, breathe healthy with the Xiaomi Smart Air Purifier 4 Pro 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 healthy all the time. Targeted purification that leaves pollutants with nowhere to hide Comprehensive monitoring of air-quality changes for more targeted, efficient purification. In Auto Mode your purifier monitors real-time air quality and automatically adjusts the purification speed. 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. Just one filter for up to one years usage Everyday freshness with a long-lasting filter The filter, made from large-area high-efficiency filter and large volume high-quality activated carbon, can last 6-12 months. No need for frequent filter replacement. 99.97% elimination of 0.3?m particles* Three-in-one filtration for high-efficiency purification The Xiaomi Smart Air Purifier 4 Pro features a three-in-one filter, including a primary filter, the Xiaomis High Efficiency Filter and a high-quality activated carbon filter, which work together to purify your air and keep you healthy. High-quality activated carbon Odour elimination for lasting freshness Activated carbon has a high adsorption rate, able to eliminate odours and keep your air fresh. Negative air ionisation Stale-air elimination to keep your home fresh Enhanced air purification with dust cleaning that will make you feel as though youre 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. Low-noise 33.7dB(A) Night Mode* High-quality air that leaves you to sleep undisturbed Switch to Night Mode to turn off display luminance for no-glare, no-noise purification. Your purifier will keep air circulating, providing you with the perfect environment for a night of sound sleep. Easy-to-clean removable top grille. Clean your purifier from the inside out To protect the infants in your house, the top grille is screwed on and cannot be removed accidentally. Unscrew and remove the grille for easy access to the fan blades and air ducts. Clean the inside of your purifier to prevent secondary pollution. The difference between Xiaomis High Efficiency Filter and conventional HEPA Filter Combining two filter technologies: Electrostatic charge and mechanical filtration, Xiaomis High Efficiency Filter media can remove 99.97% of airborne particles of 0.3 micrometers in size and traps dust, PM 2.5, pollen, pet dander, smoke and tiny particles. Compared to a conventional HEPA filter, Xiaomis High Efficiency Filter allows the air purifier to generate less noise and consume less energy by allowing more airflow to pass through the filter all the while keeping the same cleaning efficiency.