Our industrial ultrasonic humidifier uses a ceramic diaphragm vibrating at an ultrasonic frequency to create water droplets that silently exit the humidifier in the form of cool fog. Usually the mist gets forced out by fans. Ultrasonic humidifiers use a piezoelectric transducer to create a high frequency mechanical oscillation in a film of water. This forms an extremely fine mist of droplets about one to five micron in diameter, that is quickly evaporated into the air flow, thus relative humidification increased. The whole process do not need any physical or chemical heating We are always trying our best to offer our buyers good products with a cheap price, thank you for choosing our products. Please note: Only 220V is available now. We ship world wide, specific shipping fee, please contact me.UltrasonicHumidifier