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. The filter is highly efficient, made from large-area filter paper and with a high content of high-quality activated carbon. Long-lasting filter performance means less replacements, with one filter lasting 6-12 months. The Xiaomi Smart Air Purifier 4 Pro features a three-in-one filter, including a primary filter, a high-efficiency filter and a high-quality activated carbon filter, which work together to purify your air and keep you healthy. Activated carbon has a high adsorption rate, able to eliminate odours and keep your air fresh. Enhanced air purification with dust cleaning that will make you feel as though you’re in the forest. 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.