This wall clock has an atomic self-adjusting feature that picks up time calibration signals automatically.
The Jumbo Atomic Wall Clock display provides visibility from 30 feet away. Read the time, date and temperature with one glance at the large 17 inch display.
Dimensions: h=10.75" w=16.5" d=1.75"
WWVB Atomic digital clock - high-tech design looks great in any room in the house, science lab, classroom or office
Time can be displayed in 12 hour AM/PM or 24 hour format
This Atomic wall clock gets its controlling radio signal from National Institute of Standards and Technology (NIST*) in Boulder, CO, automatically adjusts clock to precise time, Selectable America Time Zone (PST/MST/CST/EST/AST/NST), DST function (daylight saving), leap year, and leap seconds (earth rotation wobble corrections)
Temperature (indoor) displays in Celsius or Fahrenheit