110v - you will need a travel hairdryer ie one that has dual voltage (110 or 240) in order for it to work properly. The ones in the cabin are useless too. Heated rollers etc (if needed) work but take a long time to heat up because of the voltage difference.
They are two pin 110/220v so you need an adaptor.
We are taking a cruise with Carnival from New Orleans to Cozumel. What voltage is being used. can I use my blow dryer, curling iron and regular iron while at sea, as well as an electric shaver.