humidifier: 1) Fashionable attractive appearance 2) Automatic power-off with relative indicator light when waterless 3) Adjustable moisture level and evenly distributed 4) Advanced noise control design, super quiet when operating 5) Energy-saving and durable using 6) Built-in anion or ozone generator to improve air quality (Optional) 7) Ceramic filter cartridge to effectively avoid water scale and bacteria (Optional) 8) Water tank volume: 0.3L