Most hotels in Cuba run on 220V. The majority of sockets are European type. It is therefore strongly recommended to check with your travel agent whether it will be necessary to bring an adapter or a converter. The adapter is installed between your devices and electrical wall outlets. It mainly resolves connection incompatibilities. The converter has the function of matching the type of voltage between your devices. It is connected to the batteries from which it receives current and to which you connect the electrical devices you want to operate.