So it is actually 30 second countdown.
An Intermatic timer is a timer that you can install in your home and connect to anything with a power source, such as lights, to program them to turn on and off at certain times of day.
Press the "stop" button and alarm will stop.
The time count of seconds will increase by 10 each time the button is pressed.
Doing this ensures that times align for when you set the timer.
If you want to pause the timer, no problem, just press the "pause" button and if you want to continue, press the "resume" button.