Electronic stainless kitchen clock timer. The time interval can be set to a maximum of 99 minutes and 59 seconds. When the set time expires, the alarm sounds for 30 seconds. Since the back part is magnetic, it easily sticks to metal surfaces in the kitchen. It counts down from the time you set or can be used as a stopwatch (keeps the time forward as well as counting down). The slim pen works with battery - AAA batteries. To reset the screen, press the min and sec keys together. Dimensions: 7cm * 6.4cm * 2cm. Screen dimensions: LCD screen 4.8cm * 2.2cm.