Enhance the air quality at your home or office with this advanced Air Filter designed specifically for the Xiaomi Smart Air Purifier 4 Compact series. Our product effectively filters airborne particles such as PM 2.5, ensuring healthier and cleaner air. The activated carbon filter layer plays a key role in absorbing harmful gases and unpleasant odors, promoting a fresher environment. H13 True HEPA capture up to 99.97% of airborne particles as small as 0.3 Micrometres. This includes dust, pollen, pet dander, smoke, and other minute particles ,Activated carbon reduce Chemicals VOCs, tobacco smoke, PM2.5,common household bad smell,Fine Mesh Layer Prevents large particles such as dander,Pet hair. Please replace regularly to keep your machine fresh and clean. For the best performance, clean the filter once a month with a soft brush gently or with a vacuum cleaner. Top-Notch Quality Used for Maximum Customer Satisfaction Guaranteed. Change the replacement filter in a minute, no tools reAdd Morequired. Note: please remove the new filter from the plastic bag before placing it into the machine. Colour:White Material:Composite Materials Package Contents: 2 * Air Purifier Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.