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In dual time mode, press A for 2 seconds to enter into setting mode, press B to set the hour and minute.
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Hold D, the number will increase rapidly. Tap A to save/exit.
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The dual time can only set the hour and minute.
6. Countdown function:
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In countdown mode, press A for 2 seconds to enter into setting mode, press B to set the second-hour-minute.
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Hold D, the number will increase rapidly. Tap A to save/exit.
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