Digital Atomic Wall Clock Automatically Adjusts to DST
Always accurate Digital Atomic Wall Clock runs on AA batteries for approximately two years before needing replacement. Accurate to 1/10,000 of a second. A controlling radio signal from NIST in Boulder, Colorado automatically adjusts to precise time, daylight savings, leap year, and leap seconds (corrections for the earth's rotational "wobble"). Displays time in a.m/p.m. or 24-hour time, plus month, date, day-of-the-week, and ambient temperature in Fahrenheit or Celsius (23° to 122°F and -5° to 50°C with 0.5 resolution). Large 2-1/4"H digits are visible from 20'. Measures 8-3/4"W x 9-3/4"H x 3/4"D. Weighs 1.1 lb. Includes wall mount, screw, two AA batteries and a certificate of traceability to NISTstandards.