Atomic Wall Clocks Battery Operated with Alarm - This digital calendar alarm day clock required 3 “AA” long life batteries (Not included) for operation, no redundant wires, easy to use.

The advantage of a radio-controlled clock that receives the time signal from WWVB is that you never have to set it again.

Nuclear clocks could be much more accurate than current atomic clocks ... and more secure digital communications. Beyond everyday technology, nuclear clocks could improve tests of fundamental ...