Marathon 24 Hour Timer w/Countdown and Count-Up White. This timer is wedge shaped for table top and laboratory use. It uses one AA battery that comes included. The digital display is large (2 inch diagonal) and the large buttons are made of rubber. Timer can easily be washed down and used constantly. It has a 24 hour capacity and it counts down in 1 second increments ; once the timer reaches zero it will beep loudly for one minute and start to count up so you can see how much time has elapsed. This timer is ideal for long cooking recipes such as roasts or experiments which take long periods of time. In addition to the timing features there is a memory button where you can easily program a special time that you always use (for example: 22 minutes for your favorite cookie recipe). When the timer is not in use you can use the timer as a clock. If you would like this timer has a special Count-up mode whereas you can push the start button when in Count-up mode and it will start counting up in 1 second intervals-just like a simple stopwatch. This timer is reliable easy to use has a large case with large display and large rubber buttons. Bottom is non-slip for stability and surface protection. RECALL FUNCTION - Memory for re-timing repetitive events; user can stop timer and add time during sessions. EASY TO USE AND READ- Tabletop digital timer is easy to use easy to read. Soft comfortable buttons and angled face. Non slip feet for stability and surface protection. COUNTS UP AND DOWN - As well as a countdown timer and minute timer this can also act as a stopwatch counting up from zero. Perfect timer for homework exercise gym workout cooking sports games and classroom timer activities. CLOCK FEATURE - Allows timer to be used as clock when not in use as timer (24 hour or am/pm format is user selectable by switch on bottom). LOUD SOUNDING ALARM - The alarm is loud and clear. You will be able to hear the alarm from a distance. Specifications for Marathon 24 Hour Timer w/Countdown and Count-Up: Manufacturer: Marathon Additional Features: Clock Feature Count up Feature Large Buttons Memory Easy To Use Color: White Width: 3.2 in Height: 1.7 in Depth/Thickness: 3.2 in Package Contents: Marathon 24 Hour Timer w/Countdown and Count-Up Marathon TI080001-WH: 24 Hour Timer w/Countdown and Count-Up White