[Jtsummers]

The clock you've linked is not an atomic clock. It has a pre-programmed clock with a battery keeping it going. If that battery dies, you still have to set the time manually.

[craftkiller]

Oh you're right! I was tricked by "AccuSet technology automatically sets the correct time when plugged in. No programming, no confusing buttons"

[martheen]

I read up the manual before realizing the vaunted tech is simply a battery backup and setting the clock in the factory.