Ozone (O3) – is a powerful sanitizer that occurs naturally when sunlight or lightning adds an extra oxygen atom to some of the O2 molecules in the air. Some of this ozone is then infused into rain drops, resulting in liquefied ozone. This process is safely miniaturized in each lotus® PRO unit to give you a chemical-free cleaner that's 3000 times faster and 50% stronger than chlorine bleach. Just like popular oxy-chemical cleaners, liquefied ozone's power comes from the extra atom that oxidizes germs and dirt. Unlike chemical cleaners, lotus® PRO's liquefied ozone reverts back into water and oxygen after its job is done. No toxins, no fumes, no residues. That's 1-2-3 ...4 good reasons to look into lotus® PRO.