📄 Product Description – Xiaomi Smart Air Purifier 4 is a smart home air purifier built for fast, whole-room purification. It delivers up to 400m³/h PM CADR to purify a 20m² room in about 10 minutes, with an effective coverage area of 28-48m² and 360° air intake. It features 3-in-1 filtration with 99.97% filtration of 0.3µm particles, a high-precision laser sensor, an OLED display with real-time PM2.5 readout, smart control via Mi Home/Xiaomi Home, and voice control support. Model: AC-M16-SC.

⭐ Key Features:
– 🔹 Fast purification & wide coverage – up to 400m³/h PM CADR (up to 6,660L/min clean air) + ~10 min for 20m² + effective area 28-48m² with 360° air intake.
– 🔹 3-in-1 high-efficiency filtration – 99.97% filtration of 0.3µm particles: primary filter + Xiaomi High Efficiency Filter + high-quality activated carbon to help reduce dust/smoke/dander/pet hair and odours/VOC gases.
– 🔹 Laser sensor + Auto Mode – high-precision laser sensing down to 0.3µm and automatic fan-speed optimisation based on real-time air quality.
– 🔹 OLED display with real-time PM2.5 – intuitive indoor air-quality data with colour indicator and simple touch controls (Auto / Night / Favourite…).
– 🔹 Smart control & automation – Mi Home/Xiaomi Home remote control, timed on/off schedules, adjustable settings, child lock, and filter-replacement monitoring + voice commands via Google Assistant / Alexa.
– 🔹 Quiet operation & long-lasting filter – as low as 32.1dB(A) (and ≤64dB(A) max) + filter lifespan approx. 6-12 months, with 22,000cm² filter area and 500,000mg activated carbon + Negative Air Ionization for a fresher feel.

🎯 Closing Paragraph:
A solid choice for bedrooms and living rooms, Xiaomi Smart Air Purifier 4 combines high CADR performance, smart automation, and clear PM2.5 visibility—ideal for everyday indoor pollutants and odours within 28-48m² rooms.

⚠️ Important Note: Performance figures (e.g., ~10 minutes for 20m², 32.1dB) depend on operating mode and conditions; real-world results vary with room size, ceiling height, and pollution level.

⚠️ Notice: Filter life (6-12 months) is an estimate and varies by air quality; rely on in-app replacement reminders to maintain best performance.