Descriptions: Large, Clear Digits. Dimensions 70x65x20mm On/Off Switch. 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. Power Supply: 1 x AAA Battery. (For Safety of Shipping, Battery Not Included). Countup Function: when time on 00:00, press ST/SP button, will count from 00:00 >> 00:01 >> 00:02... CountDown Function: after set required time, such as 99:59, press ST/SP button, will count from 99:59 >> 99:58 >> 99:57... When Countdown finished, the Timer will ring "Didididi....Didididi..." to remind you Press any button to stop the ringing. Loud, Audible Alarm, Can Hear From Another Room. Magnetic Backing and Retractable Stand. Attractive Design. High Quality Materials. Memory (remembers last setting used): Press ST/SP button will RESET to last setting used 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. The maximum time set is 99 minutes and 59 seconds. If the alarm is not stopped manually it will continue to sound for 1 minute. The timer will remember the last setting, which is useful for repetitive activities. Battery Not Included Packages:1 x Timer