Welcome to Simplyo3!
Would you prefer to have more concentrations to choose from?
This will allow you to choose the exact concentration you want. Say you see a concentration of 45 gamma and 25 gamma on your ozone generator, but there is no in between.
This product will allow you to get 35 gamma (approximately) without having to purchase a new ozone generator!
With this purchase you will get a calibration of your ozone generator and the Ozone+ regulator.