Atomic clock

From 43FoldersWiki

An atomic clock is a radio controlled clock that will reset itself by tuning into the radio signal emitted by the U.S. AtomicClock located in Fort Collins, Colorado.

You will need to first set your time zone. An atomic clock will adjust for daylight savings time.

They are not radioactive.

[edit] External links

• How Stuff Works How Atomic Clocks Work