Vietnam - power plug and socketIn Vietnam , electrical sockets and plugs are type A, C or F.
Type A has two flat parallel pins, type C has two round pins and type F has two round pins with two earth clips on the side.
Check the markings on the device before traveling. Each electrical device has a label (often on the charger) stating at which volt range and frequency it works - example “INPUT: 100-240V, 50/60 Hz”. If this range is also in the target country, you do not need a voltage converter, just check the type of socket / plug. More information about the voltage converter can be found here. Many modern hotels are equipped with several types of electrical outlets. If you already have a selected hotel where you will be staying, call there and ask about the types of electrical outlets. If you have not choosed a hotel yet, you can check them out on (Accommodation - booking.com)