So, digging a bit, it says online that you shouldn't have to worry about the voltage, as this is within the normal tolerance range for counties. 210v-230v should be fine. I'm not sure I believe it, of course. So, that's why I would contact the manufacturer.
Voltage converters look like the ones offered up on Amazon...
https://www.amazon.com/s?k=voltage+converters+for+international+travel+230v+to+220v&ref=nb_sb_noss
These are all Amazon USA, so they mostly convert 220v down to 110v.
I will say it again - contact the manufacturer to see if you actually need a voltage converter, or merely a plug adapter for your device.