Viking DefendRx Titaium Carbon Magnetic units combine photocatalytic oxidation (PCO) created with powerful UV-C light and activated carbon to eliminate toxic Volitale Organic Compounds (VOCs), bad odors, and microbial contaminants to clean your air and air system. VDX-PCO-UV-Ti-CARBON-MAG features a remote mounted power supply and a powerful magnet for mounting onto metal surfaces. The unit comes with 15″ 2 year lamp and an 18-32 VAC power supply.