LOW NOISE AND BETTER SLEEP: With noise reduction technology, the ultrasonic diffuser runs quietly without dripping sound, creating a peaceful and soothing environment for undisturbed relaxation, study, work and sleep 500ML Diffuser, Ideal for Large Rooms: Covers up to 480 sqft and can be used in large rooms. Enjoy up to 20 hours of scent. Three time settings are optional: 1/3/6H timer. EXCELLENT SAFETY: You can leave this aromatherapy diffuser on at night without worrying about overheating, as it has a waterless automatic shut-off protection to ensure the safety of you and your family. STYLISH GIFT - With its minimalist design and modern optics, the aromatherapy diffuser is a great and valuable gift for your friends and family. Essential Oil Diffuser features an ultra-modern marbled design that will complement any decor style. Some essential oils can have a therapeutic effect on sinus relief and can help you breathe better while using your air conditioner. You can also drop your favorite essential oils into the water as it is also the perfect fragrance diffuser