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With a large-sized numbers built-in alarm clock and atomic precision this elegant digital atomic clock can be mounted to a wall or set on a desk. The easy-to-read display indicates not only the time but also the date and the day of the week. Requires 1 AA battery not included. Radio-controlled atomic clocks set themselves automatically by tapping into the time signal broadcast from a cesium fountain atomic clock located in Boulder Colorado. Accurate to 1 second every 60 million years the atomic clock signal is broadcast all over North America by the National Institute of Standards and Technology.

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