The table below summarises the plug types, voltage and frequency of electrical current in both Réunion and Swaziland.
|Frequency of electrical current||50Hz||50Hz|
Réunion uses Plug Type E.
You will need this adaptor:
Socket Type E
(Réunion) to Plug Type M
The voltages found in Réunion (220V) and Swaziland (230V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Réunion and Swaziland is exactly the same (50Hz). Timing devices and appliances that use motors will function as expected under this frequency.