Help with power

Hi all this may sounds as Nut's and crazy to all I just bought a unit that the back of the item reads 220Vac but it looks like the standard power fits the item now to i use my power cord or do i need a step down transfomer for this item .. this seems weird to me that the item is mark this way having a three prone IEC back on the unit So I stand back and feel I know my answer but dam if I'm stuck ... by the way the item is made in china all the crazy answer will help ... this nut in a shell with lost for clues ...