Hydra - Style and Economy In need of an ultrasonic humidifier that is stylish, powerful and affordable! Take a close look at Hydra. Its elegance and appearance fit to your home. The large stylish transparent water tank contains 1.6 gallon. It also includes a demineralization cartridge to avoid white dust. And the patented Ionic Silver Cube™, inhibiting the growth of mold bacteria. Including hygrostat and mist output regulator for controlled humidification. Specifications: Rated Power: 35 Watt / Hygrostat / Indefinite Variable Output Level. Output Max. Up to 2 Gallon/Day / Tank Capacity: 1.6 Gallon.