The GT50 is a Convenient Plug-In Purifier that is great for any Boat upto 500 Square foot. The GT50 destroys mold, mildew, germs, bacteria and viruses including E-coli, Candida, Listeria, Staph, Salmonella, Giardia, Legionella, and Cryptosporidium. The GT50 will keep your boat smell great and fresh, So anytime you enter to your Boat, it will smell fresh without any odor smell.