The Wellness HealthPro FC-5 countertop UV toothbrush sanitizer eliminates up to 99.9% of bacteria such as E. coli and staphylococcus. The FC-5 is the perfect addition to your normal cleaning routine. Features a safety switch which automatically turns the light on when the case is closed and off when it is open. Please note that the FC-5 is made to be used before you brush when your toothbrush is dry.Why Use UV LightUltraviolet radiation is used to kill microorganisms, molds and fungi in various environmental applications. UV sterilization is used for air-purification systems, water purification, aquarium and pond maintenance, laboratory hygiene and food and beverage protection. Ultraviolet light is useful for targeted elimination of microorganisms. UV leaves no residual chemical or radiation and does not harm humans. The treatment works well with airborne and waterborne pathogens.How UV Light WorksUltraviolet light kills microorganisms by damaging their DNA. UV radiation disrupts the chemical bonds that hold the atoms of DNA together in the microorganism. If the damage is severe enough, the bacteria cannot repair the damage and the cells die. Prolonged exposure to UV light helps ensure complete kill-off of all microorganisms. Ultraviolet light penetrates the cells, but does not alter the water, air or food being treated. Nothing is added except energy.