NIB/NIP 2pk Vio Replacement Filter for Quiet Personal HEPA/H-13 Air Purifier with USB Designed for use in the Vio Personal Air Purifier which utilizes HEPA H-13 filtration technology to remove 99% of airborne particles such as dander, pollen, smoke and dust to provide clean air. Timing of replacement depends on the usage and location (i.e.: quality of the air, number of hours operating, size of space, etc.) Create a safe, comfortable breathing environment A personal space or small room HEPA-rated Air Purification System. The Vio Air Purifier features “whisper quiet” operation - a perfect solution for small room/office spaces, RVs, boats, desks, dorm rooms, & more. It utilizes HEPA H-13 filtration technology to remove 99% of airborne particles such as dander, pollen, smoke, & dust to provide clean air. CARB certified Includes: 2 HEPA/H-13 Filter Installation instructions Authentic Sealed; Never tried, opened, or used Retails $30 Price is firm unless bundling, so see my other listings to save. Multiples available for bundle discount.