The Republic of Equatorial Guinea is a country in Central Africa.
If you are planning on traveling to Equatorial Guinea with some of your personal electronic appliances, you will not be able to use them unless they are designed for 220v electrical current. Most countries outside of the Americas use 220v, including Equatorial Guinea. If you are going to Equatorial Guinea, be prepared for 220v by bringing dual-voltage appliances. If an electronic device is dual-voltage, it means that it accepts both 110v and 220v electrical current. It will indicate this by showing a 110v-220v voltage rating on its indication panel.
But if you do not own any dual-voltage appliances, and don’t want to buy any, you can buy voltage converters for your single-volt appliances.

Voltage converters attach to your electrical devices and regulate the electrical current coming out of outlets that use 220v. Without a voltage converter, your single-volt appliances are a safety hazard. They will not work, and may cause a fire. If you want to buy voltage converters for the single-volt appliances you are bringing with you to Equatorial Guinea, find the wattage rating on the appliances. If it isn’t listed, just multiply the voltage by the amp. When you have this wattage number, buy a voltage converter that is 25% higher in wattage than the appliance you intend to use it with.

Equatorial Guinea also uses two different types of electrical plugs. One of them is the American style plug that you are probably used to. However, another type of plug is also used in Equatorial Guinea, with three cylindrical prongs. Bring a plug adapter designed to fit these outlets in case you do not come across any American-style ones.

Equatorial Guinea plug adapter
Equatorial Guinea voltage converter