The electric current in Egypt is 220V. Therefore it is recommended to have an electricity converter or transmitter with the traveller to use the gadgets he brings from home.
It is always good to ask the front desk in the hotels or the tour guides about the electricity and converters if the visitors forgot to get their own.
During the past two years, for different reasons, Egypt has witnessed the cut off of electricity more often. This is why it is recommended to have a torch.