The grid in Djibouti works at 230 V and 50 Hz; the recorded sockets are Types C and E. No surprises on voltage: Djibouti runs at 230 V, the same range as at home in the UK.
Handy for multi-stop trips: Morocco, Benin, Senegal and Niger use the same plug types. Travelling further to Lesotho, Zimbabwe and the Gambia means a different adapter. 21 of the 55 destinations in Africa share the plug types of Djibouti.
Protective earth
Grounded and ungrounded sockets may occur
Mixed supply: Type C without earth, Type E with earth. Which one is in your room only shows on arrival.