Cuba.

110 V · 60 Hz on Type A, Type B.

Cuba's grid is North American in character: 110 V 60 Hz on flat-blade Type A and B sockets, so gear from the US, Canada or Mexico plugs straight in. European visitors need an adapter and, for anything not dual-voltage, nothing more than the label check — 230 V-only appliances will underperform or fail at 110 V.

The voltage window

A nominal 110 V supply may legitimately sit anywhere between 99 and 121 V (±10%). Dual-voltage gear (marked 100–240 V) shrugs at all of it.

Grid facts verified against IEC World Plugs — Cuba. Prose is our own.

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Plug straight in — Cuba runs 110 V 60 Hz on Type A, Type B.

Type A fits
Seats fine — this plug is unearthed by design.
the full story
Type B fits
Seats and keeps its earth.
the full story

Faces drawn to scale from pin dimensions · verdicts are physical fit + voltage math, not safety advice — when in doubt, ask the hardware store, not the internet.