About this item PM2.5 DETECTION: Built in infrared Sensor, monitor airborne particles as small as 2.5um in the air, and automatically adjust power and fan speed. Homintell air purifiers avoid using UV-C light, 100% ozone free. Complies with California air resources board (CARB) for indoor cleaning devices, also FCC certified, ETL listed VISIBLE AIR QUALITY: Air purifier communicate air quality through the color of the eyeballs, which let you know how clean or dirty the air quality in your home. Choose Sleep Mode at night, you almost ignore the air purifier for restful nights EFFICIENT H13 PURIFICATION SYSTEM: H13 True HEPA Filter works in combination with pre-filter and high-efficiency activated carbon filters to capture 99.97% of particles 0.3 microns in the air, including dust, smoke, pollen, pollen and reduce odors. Relieve sneezing, rhinitis and other allergy symptoms caused by air pollutants HIGH PURIFICATION & ENERGY SAVING: Purifies up to 880 ft² and filters air 4x per hour in 220 ft². Hepa air purifier fit anywhere in your home/bedroom/office. Energy saving and power saving, daily power consumption is less than 0.55kWh SMART HUMANIZED REMINDER: When the light ring flashes red, it indicates that the filter needs to be replaced. Search for B09XQN8L2G on amazon to get genuine replacement filters. Home air purifiers are the perfect gift for friends, family, babies, pregnant women, sensitive people and pet families on Christmas, Thanksgiving and other holidays