- Compatibility : This replacement filter is designed specifically for LEVOIT Core 300, Core 300-RF, and Core 300s air purifiers. It features a 3-in-1 true HEPA filter along with a highly effective activated carbon filter (part number Core 300-RF). Please note: this is not an OEM product; brand names are used solely for compatibility purposes. - Package Contents : The package includes one core 300 replacement filter. Regularly changing your filter is essential for extending the life of your air purifier. For optimal performance, it is recommended to replace filters every 3-6 months, depending on usage and environmental factors. - Advanced Filtration : The filter employs a 3-stage filtration design using H13 HEPA technology, paired with a fine pre-filter. Its multi-layer composite structure captures up to 99.98% of airborne particles, including dust, hair, pet dander, and pollen. This ensures that your home remains free from dust and unpleasant odors, promoting a cleaner and healthier living space. - Quick and Simple Replacement : Replacing your old filter is effortless. Simply remove the old filter and insert the new one in seconds, saving you both time and effort. - Use Scenarios : Ideal for households with pets, where allergens need to be effectively managed; suitable for urban environments to combat pollution; and essential for allergy sufferers looking to improve indoor air quality. This replacement filter is a practical solution for maintaining healthy air quality in your home.