1. Worry-free Purchase: 100% Ozone Free, Carb(eo No.:g-19-166), Etl, Epa, Fcc Certified & Ce Listed. Available for California. Support 24/7 Live Chat, 30-day Money Back. 2. 360°DEEP PURIFICATION SYSTEM WITH LOW NOISE – Using a new advancement in airflow technology, this HEPA air purifier circulates the entire volume of room air up to 5 times per hour to achieve rapid purification. The ultra-silent unique design – which operates with a noise level as low as 20dB is suitable for the living room, bedroom, study, storage room and other spaces up to 323ft²/30m². 3. 3-IN-1 TRUE HEPA AIR PURIFIER – The pre-filter, true HEPA filter and high-efficiency activated carbon filter capture allergens, pet hair, dander, smoke, mold, odor, and large dust particles, in addition to removing 99.97% of airborne contaminants as small as 0.3 microns. The 3-in-1 filtration system effectively improves indoor air quality so you can always enjoy the fresh air at home. 4. SMART FILTER REPLACEMENT REMINDER – With a built-in filter replacement detector, this air purifier can calculate the remaining filter life according to the filter's current condition. When the indicator turns red, the filter needs replacing. It is recommended to replace the filter every 6-8 months depending on the usage frequency and air quality. 5. 3 FAN SPEED AND 3 TIMER SETTINGS – The buttons on the panel include: power button, timer button, speed button, and filter replacement indicator. The 3 timer options (2H/4H/8H) allow you set the air purifier to run for a specific time, helping you save energy and money, while 3 fan speeds (Low/Med/High) allow you to choose a speed based on different purification needs and size of the room. 6. WORRY-FREE FOR LONG USE - We love our customers and take pride in providing a pleasant shopping experience. If you have any questions, just simply get in touch with us. We offer 24/7 live chat support and try our best to solve the problems for you.