And how is the electricity in Cuba? 110 volts and flat plugs?
What do you need it for? 110 volts are critical only for irons, pumps, soldering irons, and hair dryers with vacuum cleaners. Electric kettles.
Chargers, laptops, even televisions and desktop computers made even 15 years ago work perfectly on 110 volts.
At the cash registers, there are sometimes only sockets with flat pins. Take an adapter.
Hair dryers and irons are usually available in most hotels. In the overwhelming majority of 3-4-5 star hotels, there is at least one 220 socket. If there is only one, it usually powers the air conditioner.