A:AnswerThank you for your question. This waffle maker requires 120 Volts – 60 Hz electric power service, such as that which is used in North America. Please do not attempt to use this toaster with any other electric power service.
A:AnswerI don't believe you have to make two at the same time. I did run the unit empty for a while, prior to cooking the first batch to get it to burn in and there was no particular smoke or any ill effect