Prioritize The Filter To Enjoy Better BreathingFilter is soul of air purifier. Only 5-in-1 filtration is true filtration, just no budget burden is true savings, progressive pre-filtration and self-developed long-lasting HEPA filter make the lifespan up to 12 months, and expanded area is 30% higher than common filter. Aeockys pioneering YearChange filtera game-changer redefines your imagination for good filter. YearChange Filter Break Your Budget-WorryClean air should not be luxury. Aeocky filter equipped progressive pre-filtration and Self-developed long-lasting HEPA filter, regular cleaning to achieve YearChange (similar products change 1-3 months), even the air quality is poor, the life-span still about 6 months, 4X of similar products. Filter only 9.99, independent production is long-term supply, eliminating middleman. (Test standard base on GB/T 18801-2022, which conducts relevant tests on particle purification.)