4-in-1 Ultrasonic Air purifier & humidifier The Ümi is an ultrasonic humidifier and air purifier that optimizes the level of comfort in your child’s room. With its advanced technology and AST ™ sensors, it is ultra-quiet, requires no filters, and is energy efficient. Its air purifying function by ionization emits anions that capture the pollution particles in the air and neutralizes them very quickly. It maintains the level of desired humidity level in the room for up to 28 hours includes an aroma diffuser. The Ümi provides healthier air quality and a comfortable environment for the whole family. * Ultrasonic cool mist with AST™ Technology (Advanced Sensor Technology) * Intelligent humidistat with accurate climate control that maintains desired humidity level * Anion air purifier that reduces bacterial proliferation * Digital back lit LCD screen displays humidity and temperature levels * Aroma and essential oil diffuser * Automatic shut-off when water tank is empty * 3 level adjustable cool mist with 360° rotary output * Sleep timer with auto shut-off (1 to 4 hours) * Large tank capacity (1 gal.