Ultraviolet Cleanse Technology exposes water to UVC light. Air Multiplier technology provides whole room humidity. Accurate climate control adjusts according to room. Quiet Mark provides quiet operation. Use as humidifier and fan. Kills 99.9% of bacteria. For rooms up to 172sq.ft. Provides up to 18 hours of continuous use. Sleep timer. 0.8 Gallon tank. Remote control. 2 Year manufacturer limited warranty.