Magnetic backing and retractable stand.Attractive design.High quality materials.CountDown Function: after set required time, such as 99:59, press ST/SP button, will count from 99:59 >> 99:58 >> 99:57... When the countdown finished, the timer will sound "Didididi.... Didididi..." to remind you!Very easy to use: Press S or M key to set second or minute;Press ST/SP key to start/stop the timer;Simultaneously press the M + S button and the RESET button at 00:00.The maximum set time is 99 minutes and 59 seconds.If the alarm is not manually silenced, it will continue to sound for 1 minute.The timer will remember the last setting, which is useful for repetitive activities.Stopwatch can count up and down so can be used as a stopwatch as well as a countdown timer, ideal for cooking food, homework, exercise, sports, games, downtime (forchildren), office and classroom activities.