Vornado MD1-0026 Replacement UV Bulb Tray for Air-Purifier Contains one (1) genuine Vornado UV Bulb Tray Fits Vornado air purifier models PCO200; PCO300 and PCO500 Emits UV light to activate the titanium dioxide coating on screen to break down harmful viruses; bacteria and gases Easy to replace; no tools required Backed by a 5-year limited warranty Built to meet U.S. voltage requirements. Certified, safety-tested, and warrantied for use only in the U.S.