Marathon Atomic Digital Wall Clock White 9.5in x 1in x 6in. This digital electronic clock manufactured by the experts at Marathon Watch features an easy to read 4 inch display and accurate time keeping that's capable of staying on parity with the National Bureau of Standards (NIST) Atomic Clock in Colorado. The Marathon Watch Atomic Digital Time Clock with its self-setting and self-adjusting feature automatically receives time and date set from the NIST Colorado Atomic Clock eliminating the need to manually input the time and date. With all 8 North American time zones included on this clock you can use this clock anywhere within continental North America including Hawaii. Get this Marathon Watch Atomic Digital Calendar Clock to keep on schedule no matter where you are. Specifications for Marathon Atomic Digital Wall Clock: Manufacturer: Marathon Length: 9.5 in Width: 1 in Height: 6 in Features of Marathon Atomic Digital Wall Clock LARGE DISPLAY: Easy to read 4? high display SELF-SETTING/ADJUSTING: Using radio frequencies broadcast from NISTs Colorado Atomic Clock MULTIPLE DISPLAY MODES: 12 or 24 Hour Display Formats with Indoor Temperature Display in Celsius or Fahrenheit 8 TIME ZONES: A Marathon exclusive choose between PST MST CST EST AST NST HST & AKST with option to turn on or off Daylight Savings Time BATTERIES INCLUDED: 2 AA long life batteries included Package Contents: Marathon Atomic Digital Wall Clock Batteries Instructions Marathon CL030068-WH-SS-NA: Atomic Digital Wall Clock White 9.5in x 1in x 6in