An electronic device manufacturer, said that using it with transformer is not recommended.
I don't understand why is that. There are products that work with both voltages, and I don't understand how the output of a transformer will be different from an "original" output.
Is that really true? If so, why is it?
The device is a singer sewing machine, which I want to use in the USA and in Europe, with different power outlets.
Even if regular transformer wouldn't work, I'll be glad to hear about other solutions.