Air Purifier for Large Rooms: CADR rates 420 m³/h to quickly and efficiently filter pollen, pet dander, and dust in the air in a 370sq. ft. room and help your family breathe better Heightened Purifying Performance: Air inlet grille, washable pre-filter and 3-stage H13 true HEPA filter for a total of 5 layers to trap 99.97% or more of particles which are 0.3 microns Air Quality Monitor Sensor: The professional monitor sensor real-time detects air near the control panel and filter to accurately display the air quality with value and corresponding color for easy checking; the air purifier will indicate when the filter needs replacing 3 Adjustable Fan Speeds: Choose from 3 fan speeds manually or let the Auto mode automatically switch fan speed based on the air quality of the room – hassle-free way to keep the air healthy Low Operation Noise: As low as 32dB under Sleep mode, much quieter than a library, it won’t even wake up your baby Safe for Kids and Pets Friendly: Air purifiers for kids and pets is for large space, guards your kids against pets hair and pet dander, allows all your families members to breathe pure air and live happily Note: Please remove plastic packaging of new filter before running the air purifier, we highly recommend replacing the filter at least once each 3 to 6 months