The PureGuardian Ultrasonic cool mist humidifier helps you maintain the ideal humidity level in your home. This humidifier features a three-speed electronic mist control to let you adjust the level of cool mist to your preference. The Silver Clean technology inhibits the growth of mould and mildew on the water tank's surface for clean air. | PureGuardian H965WC Ultrasonic Cool Mist Humidifier