I want to get a device in the US with the following electrical specifications. I think it should work in Nigeria without the need for a voltage adapter but I want to be very certain. Does any know know for sure?

Line voltage: 100-240V AC
Input current: 0.2 amp
Frequency: 50Hz to 60Hz

Yers it will.

If I'm correct, 100-240 AC works both in North America and Europe and anywhere else that uses similar voltage, including Nigeria. Depending on where you are in Nigeria, you may want to get an adapter as the plug sockets could either be 2-pin (US) or 3pin (UK) or "other".

Thanks @ LordReed,

Thanks @N101,

You're referring to the normally white plug adapter with 3 pins, right? Not a step-up voltage regulator to convert US voltage to Nigerian.

@godash
He won't need a step down because the device is already rated to work on 220v-240v.