Unit converter does not supports negative
values.
Countdown Timer
This function is helpful when you need to be reminded of a
specific event or you want to time a particular task.
Select Menu > Tools > Countdown.
1.
2.
Specify the time for the reminder in terms of hours
and minutes. The maximum time you can set is 23
hours, 59 minutes and 59 seconds (23:59:59) and the
minimum is one second (00:00:01).
3.
When the countdown is completed, the alarm rings.
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