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Could you give a detailed description of power options for RS250?
For example, RS201E has an external switching power supply, so it could be used in 100-240V range.
I see RS250 has a linear transformer. Does this mean there are 2 options (2 distinct devices) one for each voltage? Or maybe it has a selector for different voltages? I'd like to be able to use it in Europe (~230V) and in the USA (~120V).