This is a Levoit Vital 100 True HEPA air purifier. It does not include a filter, so a separate filter is required. Filters are sold on Amazon and other retailers, so it's recommended for those who will purchase a separate filter. Operation has been confirmed! It uses an electrostatic HEPA filter that captures particles such as pet hair, house dust, and pollen. It is suitable for rooms up to 17 tatami mats (approximately 28 square meters). It is recommended for use in various places such as living rooms, bedrooms, and entryways.