Hunter 31206 germ shield plus visible mist humidifier solves the problem of dry air in your home. Ultrasonic technology uses sound vibrations at a very high frequency to produce the humidity. UVC technology kills up to 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. Intended for use in medium rooms it has a 24-hour run time. NightGlo night light softly lights your room. Included demineralization cartridge. Removes minerals from the water to prevent "white dust". Mechanical controls for easy operation. 3-Year limited warranty.