Digital atomic wood wall or table clock features Month/day/date LCD display with alarm clock and indoor temperature. Dimensions 10"W by 7" H. Using the same technology NASA employs to tell time, Atomic clocks wirelessly synchronize with the National Institute of Standards and Technology's atomic clock in Boulder, Colorado. In addition to daily confirming the time, these clocks automatically adjust for Daylight Saving Time and run up to two years on a single AA battery. No wires, no worries, and no more excuses for being late.