Here's why you need an adapter
The outlets and plugs used in French Guiana are C, D & E. Take a look at the pictures below to see what each plug and socket type looks like.
Voltage and frequency Kiribati vs French Guiana
All outlets in Kiribati provide a standard voltage of 240V with a frequency of 50Hz.Voltage: 240V Frequency: 50Hz
All outlets in French Guiana provide a standard voltage of 220V with a frequency of 50Hz.Voltage: 220V Frequency: 50Hz