The fact that all of this time has passed and no one has responded should tell you something.
It appears to be an ionizer - a device that adds ions (usually copper or copper and silver) to the water. There appears no way to adjust the output for different size pools or different bather loads. Surely one device can not handle all the contamination of two people in a 10,000 gallon pool, 25 people in a 30,000 gallon pool and 4 people in a spa.
Copper can build up in the water and cause stains.
Copper and silver are excellent algaecides and at high levels can kill bacteria. But killing organisms is only about 10-15 percent of what needs to be done. Something needs to oxidize all the organics and swimmer waste brought into the water. Things like sweat, urine, saliva, mucous, soap, deodorant, hair spray, makeup, Cologne, perfume, body lotion, Suntan oil, fecal matter, dead skin,etc. Ionizers will not remove or destroy these organics. You can use a non-chlorine oxidizer but you may