The Honeywell Designer Series Cool Mist Humidifier utilizes a filter free and ultra-quiet approach to releasing ultrasonic cool mist into the surrounding air. Adjustable mist controls will allow owners to manually select their preferred mist output settings via a textured metal control wheel. The illuminated water window includes three settings (bright/dim/off). These lighting features and a wide tank opening allow for a seamless cleaning and refilling process. Tank Capacity: 1.25 gal; Maximum Run Time: 24 h; Color(s): Black; Output Per Day: 1.25 gal.