Confronting Hay Fever: Air purifiers can effectively filter out pollen allergens, allowing your family to breathe easier and reduce discomfort. High Efficient Air Filtration: The Core 400S filters your room in a matter of minutes. Large Purification Area 360°: With VortexAir technology, it cleans an 83㎡ room 2x an hour. 3-Stage HEPA Filter: Traps particulate matter like dust, fur, lint and hair down to 0.3 microns. PM-2.5 Intelligent Air Quality Sensor: Detects the amount of PM2.5 particles in the air. Sensitive Auto Mode: Automatically adjusts fan speed based on air quality. Silent Operation - Whisper Quiet: Operates at a very low noise level. Convenient Smart Control: Use the VeSync app to control settings, check filter life, and create schedules from anywhere. 2 Year Warranty & Longer Filter Life: Includes a 2-year warranty and lifetime customer service. Recommended filter replacement every 12 months.