Fran,
While the power supply itself will operate on 240 volts, the connector must be rewired for that correct voltage configuration. Your plug (power connector) is wired for 117V-AC, thus the placement of the silver label.
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)