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That's an Ozone cleaner. It will void any ResMed warranty if you use it. I don't know about other brands.
I do know that Respironics doesn't promote ozone cleaner use either but they don't sell cpap machines any more (in the US anyway). Ozone cleaner use has been known to damage or cause breakdown of the insulating foam in the machine.
It also will cause premature aging of the mask materials.

Not to mention ozone cleaners don't actually clean anything (clean as in remove dirt, grime, snot, facial oils, etc).
They may or may not actually nuke stuff depending on if people believe the propagranda or not that gets promoted by the makers/sellers of this type of product.

Most forum veterans consider this sort of product dangerous for any number of reasons.....and won't endorse using it.
Discussed ad nauseum here on the forum in the past. Search for "SoClean" or "ozone cleaners" here on the forum and start reading.

I saw a "No clean" at Goodwill. They wanted $19.95.
Still not worth it.
At one time, I might have put it in my fridge, but who wants a YELLOW interior?
Ozone also does icky things you don't see.