The built-in noise shield ensures quiet operation by reducing sound levels while maintaining powerful air purification. With its compact Swedish deign, this sleek, space-saving device blends minimalist style and efficient performance. The Particle + Carbon filters have a long-lasting performance without the need for frequent replacements. Enjoy cleaner air with fewer maintenance interruptions. Keep your pre-filter fresh by washing with a gentle cycle and mild detergent to maintain peak performance. Each Unit Cleans up to 432 square feet in 60 Minutes Three Fan Speeds Adapt to Your Air Quality Needs Space-Saving, Compact Design for Easy Placement Reusable, Washable Pre-Filters for Easy Maintenance 2 Pack