What is the Sauna Ioniser used for?

Ioniser

this has the ion button which you would use during the sauna session to counteract all the negative ions that are produced while detoxing.

The o3  or Ozone button is used after the sauna session for around 5 minutes to clean and sterilise the sauna- this produces 03  Ozone which kills any bacteria thus making the sauna a self cleaning sauna.