Mrsd:
Your 110 volt appliances will just 'fry' if you plug them into the sockets at the Blau which, in common with most modern Cuban hotels, are 220 volts.
You will need an converter, but even that is not guaranteed to work, as Millybess says. Debmich purchased one from WalMart for around $20 but it just did not work at the Blau.
In the UK we are on 240 volts so we only need a simple adapter to plug into the sockets and all our appliances work fine.
I'm taking this set of curling tongs over to Debmich on Saturday, along with an adapter, so next visit to Cuba she will have no problem with her hair.
