SELF-SETTING, SELF-ADJUSTING CLOCK - Simply insert the batteries included & this Marathon Atomic Wall Clock will synchronize to the correct time using radio frequencies broadcast from NISTs Colorado Atomic Clock (only functions in North America). LARGE DISPLAY - The clocks large, 9-inch display and sleek, contemporary design make it ideal for a home, office, school, or hospital. It easily hangs on a wall or can be placed on a table top using the sturdy fold-out stand. MULTIPLE MODES - Choose from three different displays: AM/PM or 24-hour format; the month, weekday, and date; or the indoor room temperature in Celsius or Fahrenheit. EIGHT TIME ZONES - This clock includes all eight North American time zones. Choose from Pacific, Mountain, Central, Eastern, Atlantic, Newfoundland, Alaska, and Hawaii standard time. MARATHON - A family company that has been producing timing instruments for over 80 years. Our uncompromising quest for technical excellence allows us to produce the mo