On Curacao we have mainly 110 voltage sockets (flat plug) for electricity. To accommodate our European guests many accommodations also feature 220 voltage sockets (round plug).
Most appliances nowadays are multi voltage 110 ~ 230 and can be used in both sockets. There are always adapters available for your convenience.
BE AWARE !!! Never use a 110 appliance or device in a 220 socket. The product will burn and be broken if done so.