Bring cooling mist wherever you go with the HoMedics TotalComfort portable ultrasonic humidifier. This compact unit creates a cooling mist that will refresh a small area for up to ten hours on one water tank, with battery or USB power options. Its small size and ultra-quiet performance make it a great addition to sleep spaces and work environments. | HoMedics TotalComfort Portable Ultrasonic Humidifier - White