Xiaomi Smart Air Purifier 4 Pro Filter PM2.5 and pollen filtration Pet hair filtration Odour elimination Three-layer high-efficiency filtration to protect your health

Can only be used with Xiaomi Smart Air Purifier 4 Pro All-in-one powerful filter Clean air outputs after layers of purificationA primary filter, Xiaomi's High Efficiency Filter and a high-quality activated carbon filter work together to purify your air and keep you healthy. High-quality activated carbon .Primary Filter 360° large particles blockingThe primary filter provides an initial filtration by filtering dust, hair, fine crumbs among other large particles and is resistant to creases, oil, acids, alkalis and more to ensure a long service life. Xiaomi's High Efficiency Filter.Xiaomi's High Efficiency Filter 99.97% filtration of 0.3μm particles The 24000cm² high-efficiency filter* removes PM2.5, pollen etc. to output consistent clean air. Primary filter. High-quality activated carbonThe 650000mg high-quality activated carbon*, with the sophisticated porous structure and evenly distributed carbon, effectively removes air pollutants and odour that are harmful in your home. The difference between Xiaomi's High Efficiency Filter and conventional HEPA FilterCombining two filter technologies: Electrostatic charge and mechanical filtration, Xiaomi's 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, Xiaomi's 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.