Travelling in Haiti you will meet Types A and B sockets, fed with 110 V at 60 Hz. 110 V instead of 230 V: check the rating plate before you plug in a hair dryer. An adapter does not change voltage. The grid runs at 60 Hz. Chargers do not care; mains-synchronised clocks and simple motors do.
Handy for multi-stop trips: Belize, El Salvador, Panama and Antigua and Barbuda use the same plug types. Nearby but different: Grenada, Saint Lucia and Guadeloupe – an adapter for Haiti will not fit there. 24 of the 31 destinations in North and Central America share the plug types of Haiti.
Protective earth
Grounded and ungrounded sockets may occur
Mixed supply: Type A without earth, Type B with earth. Which one is in your room only shows on arrival.
Check the rating plate: 110 V suits “100–240 V” supplies, not single-voltage appliances. Frequency is 60 Hz; timers and simple motors run differently. Check your own device →
At 110 V it depends on the rating plate: “100–240 V” is fine, single-voltage gear is not.
An adapter changes the plug shape only, not voltage or frequency. Haiti supplies 110 V at 60 Hz – check the rating plate on your device. How to read a rating plate →
If a socket gets hot, crackles or smells burnt, unplug the device straight away.