Sockets in Cameroon: Types C and E, supplied with 230 V at 50 Hz. 230 V means no voltage converter – only the plug shape matters.
The same socket system is used in Mauritania, Benin, Djibouti and Niger, so one adapter covers all of them. Watch out when moving on: Nigeria, Botswana and the Gambia use a completely different system. Across Africa this setup is common: 21 of 55 countries.
Protective earth
Grounded and ungrounded sockets may occur
Earthed sockets (Type E) and unearthed ones (Type C) exist side by side. For metal-bodied appliances the protective-earth path is what matters.