Kills up to 99.999% Bacteria, Mold & Spores * Patented Ultraviolet Chamber * Up to 24 Hours of Operation per Filling. Dual Tanks for Easy Filling * Adjustable Humidity Control w/ Multiple Output Settings * Medicine cup allows for the use of Vicks Vaposteam or Kaz Inhalent to produce a medicated vapor that sooths irritated nose and throat membranes