My dad brought me an electronic sharpener when I was in maybe 3rd grade. Operates on 240v. I havent been able to something similar to it so back I was using staedtler wooden pencils (only way to go with wooden pencils btw) I was using that sharpner with a voltage transformer in our house. In fact my dad who uses only staedtler pencils is now using it in NYC. Greatest. Sharpener. Ever.