Features:

Atomic time with optional manual setting
Automatically sets to exact time
Accurate to the second
Automatically updates for daylight saving time (on/off option)
4 time zone settings
Optional extended battery life. Insert two batteries in the compartment below the movement to extend battery life.

Specifications:

4 Time Zones: Eastern, Central, Mountain, Pacific

Power Requirements:

1 "AA" Alkaline Battery (not included)
Optional: 2 "AA" Alkaline Battery (not included) for extended

Dimensions: 12" Diameter x 2" Deep