Compare the plug shapes, voltage and frequency in Vanuatu and United States, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Vanuatu, you will need a travel adapter for United States. Vanuatu uses Type I plugs, and United States uses Type A/Type B, so the pin shapes will not fit any wall socket. Voltages differ (230 V at home vs 120 V abroad), so check the label on each device. Most modern dual-voltage chargers handle the swing without a converter, but heating appliances usually do not. The mains frequency is also different (50 Hz vs 60 Hz). This rarely matters for electronics but can affect motor-driven devices like clocks and shavers.
Vanuatu (home)
United States (destination)
Electrical specifications in United States
More about plugs in United States
In United States, the standard power plug is Type A and Type B. The country runs on 120 volts at 60 Hz. That means wall sockets in United States can be one of 2 different shapes — Type A, Type B, and your plug needs to physically match the socket to fit.
Full United States plug guide