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well, i know that the voltage in the US (canada?) is 110V-120V,
and in Europe and Asia, it's 220V-230V.... Double check in your place...but i'm pretty sure it's 220V....
Now, see if the 'expander' you bought has an option to switch to 220V.... for ex. on my computer, i have the option to switch between 110 and 220...( u know, that small little red tab on the back)
if you don't have that option, you need to buy a transformer...to change the 220V to 110V.....

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