¹Notes: *Our filter has a strong filtration performance of ultra fine particles. 99.97% filtration efficiency for 0.1~0.3?m airborne particulates, including pollen, dust, and animal dander allergens. Disclaimer: Tested by an independent lab. ²CADR and Coverage area are calculated based on Levoit's Original Filters and are not applicable to other replacement filters. ³Notes: *Levoit Original Filter is HEPA-grade while operating in Sleep Mode, as tested by an independent lab. ?Notes: *For the best performance and longest lifespan, use official Levoit replacement filters. ?Notes: *We recommend replacing your filters every 6 to 8 months. ?Note: *The voltage of the air purifier is 120V and is suitable for use only in the United States. ?*Only the Core 300S-P features smart connectivity and Auto Mode. The Core 300-P and Core P350-P do not include Auto Mode and require manual fan speed control.