Xiaomi Smart Air Purifier 4 has a Particle CADR of up to 400m³/h, able to deliver 6660L of purified air per minute, and with 360° all-round air intake, whole-room air purification is effortless. All-day protection for those who suffer from rhinitis and allergies. Xiaomi Smart Air Purifier 4 protects your respiratory health by keeping the air in your home clean and safe to breathe. Activated carbon has a high adsorption rate and effectively removes common harmful gases such as VOC from your home, as well as eliminating odours to keep your air fresh. Sensitive high-precision laser sensors monitor changes in air quality. High-efficiency purification in Auto Mode — your purifier monitors real-time air quality and automatically adjusts purification speed. With support for smart control, ensure that you always return to a home filled with clean, fresh air. Use the Mi Home/Xiaomi Home app from your smartphone to enable purification when away from home.