Acting as both a humidifier and diffuser, the Dual 100-RBW fills rooms with invigorating fragrances and healthy humidity, creating a comfortable atmosphere. Ultrasonic cool mist technology, a spiral duct design, and 3 mist levels powerfully infuse the air, providing temporary relief for coughing, congestion, sore throats, and allergy symptoms. Enjoy stimulating or soothing fragrances by adding your favorite essential oils to the base of the device. The large capacity tank easily covers mid-sized rooms while operating at a discreet 28dB, ensuring it will never interfere with your sleep. Reinvigorate your environment with the Dual 100-RBW. Color: White.