Operation Step:
Open the battery cover. Insert one (1) “AAA” size battery (not included) observing the battery polarity(+/-) polarity as indicated in the diagram. Securely close the battery cover.
Press the MIN and/or SEC Buttons to set the desired countdown time (up to 99 min 59 sec).
Press the START/STOP Button to activate or deactivate the countdown timer.
To silence the alarm(after the timer has elapsed): Press the START/STOP Button.
 

NOTE:
The timer has a built-in memory function that will return the timer display to the last ser countdown time.
To clear the countdown timer, simultaneously press both the MIN and SEC buttons.