The beneficial properties of ozone are well documented; disinfection of bacteria and germs; inactivation of viruses and fungi, reduction of noxious odors, oxidation of heavy metals, cyanide and other dangerous organic compounds and increased levels of oxygen 

This unit has the ozone generator built in so you don't need to connect it to anything other than the wall outlet. 

I am selling this for a friend. She says she used in around 3 times with no problems noted. This is an older model and is priced accordingly. 

Please ask any questions before bidding and thank you for looking!