good question, I don’t know. I checked my Rega plug, it does not say. You can buy an adapter and/or converter, UK is 230V, and a lot of small electronics: laptops, phones do 110 to 230V. I wouldn’t worry about, but it’s worth asking Rega. I imagine everyone is different, depending on their market.
The Rega IO manual says Power outputs at 230/115V supply so it’s likely the same for the turntable, you will just need a 3 dollar adapter.