Humidifier with 99.999% effective germ-killing power Rid the air in your home of bacteria, mold, and spores2.0-gallon tank capacity with ultraviolet chamber Operates for up to 24 hours on one fill Adjustable humidity control and output settings Medicine cup allows for use of liquid inhalant Dimensions: 16.9L x 12.3W x 13.6H inches. With ultraviolet technology, the Vicks GermFree Humidifier is effective at killing nearly 100% of health-problem-causing bacteria, mold, and sports. It operates for up to 24 hours on a single 2-gallon fill. About Vick'sSince the inception of Vick's Vaporub over 100 years ago, this company has been dedicated to helping people breath easier. They are responsible for creating some of the most popular pharmaceutical products on the market, as well as a full line of helpful gadgets and accessories. When you're not feeling your best, look to Vick's.