Diffuses 100% all-natural essential oils with aroma coverage that lasts up to 7 hours;Refreshes and moisturizes the air in rooms up to 250 square feet making it easier to breathe and relieving a variety of conditions including cold, nasal congestion, allergies, asthma and more;Helps deodorize air of strong tobacco, pet odors, and more;Gentle, whisper-like ultrasonic operation is perfect for use in a nursery, office, spa, yoga studio, or in any room of your home;Optional color-changing LED lighting creates a relaxing ambiance and soft night glow while ionizer feature helps lift mood and relieve stress