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Understanding alarm clock description

  1. Aug 21, 2008 #1

    Can someone please explain to me what this means? What is "dual power and dual time"? Will it plug into my outlet or not (I have the type of outlet that is ubiquitous in the United States)? What is meant by "keeps proper time with 110 or 220 volts"?
  2. jcsd
  3. Aug 21, 2008 #2


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    Hi ehrenfest! :smile:

    It just means that in some countries the mains power supply is 220V instead of 110V, and 60Hz instead of 50Hz.

    The different Hz would affect the rate of the clock (so "dual time"), and the different V would damage the thing!

    This item has a switch which changes it safely and accurately from one type to the other. :smile:
  4. Aug 21, 2008 #3
    I see now! So it has nothing to do with an extra spacetime dimension like I originally thought. :smile:
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