well the voltage in iran is 220 V but in your country is 110 so you need some converter to sole this problem for you and in iran, electricity prizes have 2 holes not 3_enjoy your travel next month is our Nowruz festival it's a celebration for beginning a new year.I hope that I can see you there . come and see SHIRAZ too it's a historical city...more info about Nowruz festival:en.wikipedia.org/wiki/Nowruz