The Instant Home Air Purifier Replacement Filter F300 is a blue HEPA filter designed for the AP300 model. With a filter life of 8 months, this air purifier captures allergens, dust, pet dander, bacteria, and pollen. It features wireless and portable design, making it easy to use in any room. The filter replacement indicator ensures that you are always aware when it's time to replace the filter. With true HEPA, HyperHEPA, and HEPA-Type filtration technology, this Instant air purifier is a reliable choice for improving indoor air quality.