HeroNeo&reg; Large LCD Digital Kitchen Cooking Timer Count-Down Up Clock Loud Alarm Magnetic (Green) Timer can count up and down so can be used as a stopwatch as well as a countdown timer, ideal for cooking food, homework, workout, sports, games, time out (for kids), office and classroom activities Very Easy For Use: Press S or M Button to set the second or minute; Press ST/SP button to start/stop the timer; press M button + S button at the same time will RESET the time to 00:00 Countup Function: when time on 00:00, press ST/SP button, will count from 00:00 &gt;&gt; 00:01 &gt;&gt; 00:02... CountDown Function: after set required time, such as 99:59, press ST/SP button, will count from 99:59 &gt;&gt; 99:58 &gt;&gt; 99:57... When Countdown finished, the Timer will ring "Didididi....Didididi..." to remind you!