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Q1: The item does not state in the description that it is atomic. We would like to know how it changes Daylight Savings Time automatically if it is not atomic. Will it change Daylight Savings Time automatically if clocks are underground?
A: Also It uses 1 AA battery. The daylight savings feature is based on the movement in the clock. You set it for your timezone/day/time, the rest is automatic. Because it doesn't rely on radio waves it will work underground.
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