• Adopted enhanced air duct system, YIOU air purifiers can purifiy up to 547 ft² room twice per hour and effectively block air-born pollution.
• 3-Stage True HEPA Filter: Consisted of pre-layer, H13 true HEPA layer and activated carbon layer, YIOU air filter can capture large airborne particles, and decompose unpleasant odors in turn to relief respiratory discomfort.[Please search B0972641SV for replacement filter.]
• Real-time Air Quality Indicator: Built in a high precision laser sensor, YIOU air purifiers for home will glow red/yellow/green to reveal poor/good/excellent air quality by detecting airborne particles as small as 0.3um.
• Sleep within a Sound of Silence: For a halcyon and healthier sleep at night, YIOU air purifiers for bedroom can work at 20dB in sleep mode with the indicators half on or off and no buzz or beep. Using timer setting from 1-7 hours and child lock at the same time for better user experience.
• Certificated Air Cleaner: Complying with Part 15 of the FCC rules, YIOU air purifier has a CADR of 140 CFM for smoke, 139 CFM for dust and 144 CFM for pollen, effective for wildfire smoke and allergies larger than 0.3 um

Shipping Note: Shipping to Alaska, Hawaii, PO Boxes, and APO addresses is not available for this item

Warranty: 90 Day Woot Limited Warranty