Xiaomi Smart Air Purifier 4 captures 99.99% particles with HEPA 13 filter, OLED display for real-time PM2.5 monitoring, and app control for auto mode. Quiet at 20dB in sleep mode, it covers 48m² efficiently with laser sensor and smart scenes. Integrates with Mi Home for voice commands, ensuring clean, allergen-free air year-round. https://www.mi.com/in/product/xiaomi-smart-air-purifier-4/