Adapter for Thailand
 

Coming from the US do I need a type O adapter for Thailand?

iPhone, IPad, Fitbit watch, and curling iron

>> In Thailand, power plugs and sockets (outlets) of type A, type B, type C, type F and type O are used. The standard voltage is 220 V at a frequency of 50 Hz. Yes, you need a power plug travel adapter for sockets type A, C, F and O in Thailand.

>> No need to buy a converter since all Apple products are 100-240 Volt, and 50/60 Hz, but you will need a wall plug adapter for the country to which you are traveling.

Check your curling iron. The voltage and frequency should be shown on the tag attached to it or it may be printed into the body or look it up. It is probably dual voltage.

ELECTRICITY (tourismthailand.org)

Electrical sockets in Thailand are compatible with both flat parallel prongs (like in the United States and Japan) and two round pins (like in most European and Asian countries). While two-pin sockets are common in Thailand, some establishments like hotels and offices also have three-pin outlets installed.

So from US 2 flat prongs would plug in without anything else in Bangkok, Chiang Mai, and Chiang Rai.
or I have a 2 round pin adapter from my Europe travels.

so I don’t need an O. A ?