2.11Gal. water tank Ultrasonic Cool Mist Humidifier Moisturize the dry air in your home or offices in minutes. It is ideal for use in medium and large-sized rooms, which up to 500 sq.ft. Up to 36 hours constant moisture at one top fill. Keecoon humidifiers create a better home life for those suffering from colds, allergies, and dry skin. Order yours now! 10% OFF code: HelloEasy to UseTop Filling construction of this large room humidifier provides for hassle-free refilling (can fill tap water directly). Easy touch Top panel for easier operation