1.[COMPATIBILITY]This premium A2001 HEPA filters compatible with A2001 Air Purifiers. Compared Part #AF-2001.(Please check your air purifier model before purchasing) 2.[3 STAGE OF FILTRATION]Our A2001 hepa air purifier replacement h13 filter adopts 3-stage true HEPA filtration technology to reduce airborne particles and unwanted odors in your living space to providing you with the freshest air, so that you can enjoy clean air. 3.[Cost-effective A2001 Filters]Package contains 2 Pack x A2001 replacement filter, which help save money for you. Our A2001 air filters are made of high quality and y materials at a cost-effective price, the right choice for you 4.[EASY TO REPLACE]The A2001 true hepa h13 filter is easy to install and replace. When the reminder flashes an orange light, at this time you need to hold down the button for 3-5s to stop flashing, then replace the filter with a one. To ensure the of you and your family, we recommend replacing the filter cartridge every 2-6 months