Do I need to bring an adapter or transformer to Cuba?

In Cuba the sockets are of the American type with two flat legs (Type A). In general the electricity in Cuba is 110V/60Hz, although in some hotels (normally in the bathrooms) they have 220V and a socket for round legs of European type. (A type C)
It is advisable to ask at your hotel before leaving and to bring an adapter if necessary.
Do you need a transformer? This depends on your electronic devices. Check your chargers to see if they are compatible with 110V.