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