European electrical outlets are 220 volts, 50 cycles, rather than our 110/120 volts, 60 cycles. If you want to bring something electrical, like a curling iron, bring one that is manufactured for both 110 and 220 volts. Then you will only need a plug adapter. It’s better to purchase a European curling iron or flat iron at the department store next door probably for under 20 Euros. Today, most laptops, telephones, tablets, headsets, etc. have dual voltage and can be charged with the European 220V system. Please let us know if we can assist you with any special needs you may have, such as breathing devices (CPAPs), for example. Plug adapters differ in various countries – hotels typically will sell or provide them. You can also buy them online before departure.