Hi Jan P....I've been watching to see if anyone could answer your question about the dual voltage on the Jem 760. Since no one has I would suggest getting a call into your dealer or go to the "ask Jan" section and submit your question there. No one should be left hanging and you must have a reason for your unusual question. Good Luck. Jeane
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Jeane MC11000 se, MC6500, FM-725, 525S, Compulock, 760 Jem, White Serger