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This robot cleaner comes with a wind recycling system to improve cleaning performance. With the powerful suction function, dusts will go through a 3-stage filter system (pre screening filter, HEPA filter and cluster ionizer). It will reproduce fresh air with ions by spraying on to the floor through compressed nozzles and inhales again through suction vent. Equipped with a cluster ionizer, this robot cleaner effectively eliminates fungi, viruses, allergens and microorganisms and makes the air in your home healthier and cleaner.