New Holmes HCM600-U Cool Mist Two Speed 1 Gallon Humidifier 600 Square Feet Room New Holmes HCM600-U Cool Mist Two Speed 1 Gallon Humidifier Fast Check Dial: Hassle Free Maintenance: The Convenient monitor lets you know when it is time to replace the filter Antimicrobial protection: is infused into the plastics to help prevent the growth of bacteria that can cause stains and odors or adversely affect performance. Enhanced filter: Arm &amp; Hammer backing soda naturally deodorizes the air by absorbing and eliminating odors that come from garbage bathrooms, pet litter boxes and smoke and cooking White with blue tank