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Sorry this is slightly off-topic; please let me know
of any more suitable groups to which I should post this
question.

The manufacturer's website claims it can use all economy tariffs.

So does it somehow "know" when to switch on and start heating
itself? How does it "know" what time it is? There are no visible
controls to govern what times to switch on and switch off, and
there is no visible clock or time-setting controls.

I'm in Manchester, UK, and on an Economy 7 tariff that apparently
is split from 22:30-00:30, 02:30-07:30.

I'm trying to make sure the things won't come on in winter
at the expensive rate between 00:30 and 02:30.

Is some "signal" transmitted on the mains line during
night rate?

Martin - confused and slightly worried

Hello,

It seems like modern electronics are all about being small and thin
these days. Check out this article on the new ""thin is in"" trend:

http://ezinearticles.com/?Thin-Is-In-For-Technology&id=1160990

I think that smaller electronics can often be more convenient, but
what are your thoughts as to the pros and cons of thin electronics?