Sparky Projects | Ioniser/ozone generator (read description) @sparkyprojects | Uploaded February 2022 | Updated October 2024, 22 hours ago.
Described as
"Ozonizer Ceramic Plate, Ozonizer Air Purifier,Portable 7g/h 110V/220V Ozone Generator with Double Sheet Ceramic Plate Air Sterilize "
@bigclivedotcom has reviewed similar items with ceramic plates, but this has a double plate.
I ddn't dig any further, but it looks like it's an astable multivibrator using just the 2 transistors on the heaatsink.

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