Designed to receive the radio signals emitted
from the U.S. Atomic Clock in Boulder,
Colorado, this clock automatically calibrates
itself six times daily to ensure accuracy; it even
updates for Daylight Saving Time changes.
With an 18" diameter bezel, the 13-1/2" dial has oversize
numerals for legibility from a distance, and
includes a Celsius/Fahrenheit thermometer and
a hygrometer to measure relative humidity.
Designed primarily for indoor use, it is usable
outdoors in sheltered locations and temperate
conditions. Runs on one AA battery (not
Please note: the radio signals broadcast are detectable throughout the United States (except Alaska and Hawaii) and in most parts of Canada (except the Yukon and Northwest Territories, Nunavut, and the Atlantic provinces). For areas where there is no signal detection, this clock will operate as a normal clock and will require manual time correction as necessary.