Beurer 2-In-1 Air Washer LW 230 White humidifies ambient air through cold evaporation and also cleans it through air washing. Includes silver ion pads that prevent the development of bacteria, fungi and algae in the water, meaning there is no need to add chemical fluids. Features blue LCD light, night operation at level 1 or 2, can be used with timer and has components that are easy to dismantle.