Atomic clock movements are accurate to 1 billionth of a second. Both quartz movements contain a miniaturized radio receiver that monitors a low frequency time signal that broadcasts from Fort Collins, Colorado. The atomic radio signal enables the movement to self-correct every day (up to 5 times per day) so it always shows the exact time according to the national time standard. The movement is capable of running traditional hands and is equipped with a special antenna designed for increased reception sensitivity. The second hand moves in a step motion. Due to its radio signal, this movement cannot be used with metal dials.

Warranty	1 year
Maximum Dial Thickness	See Below
Total Shaft Length	See Below"
Shaft Diameter	5/16"
Chiming Melody Sound	None
Case Size	3 5/8"H x 2 3/16"W x 5/8"D
Free Pair of Hands*	Yes
Battery	1 AA (#45001)
Hardware Included	Yes

*You will be able to choose your Free Pair of Hands after you make your selection below. Select Group A Sweep Second Hand are an additional charge.