Hunter 35156 germ shiled plus bacteria free vaporizer solves the problem of dry air in your home. The vaporizer's boiling temperature kills 99-percent of germs, viruses, mold and mildew in the water. Microban antimicrobial protection only on hunter humidifiers helps prevent odor-causing bacterial mold and mildew on the humidifier. Wick free no wick to replace ever means more cost savings and less maintenance for you. Convenient medicine tray included. Intended for use in small rooms it has a 24-hour run time. Mechanical controls for easy operation.