Bjerg Instruments Digital Kitchen Timer with Extra Large Digit LCD Display Large 2" by 3" LCD Screen Is Easy To See. Now you don't have to squint! Easy to Set. Hold down minute and second button to reset. One button for Start and Stop. Loud Beep When Timer Goes Off. Easy to hear the timer go off so you don't miss it. Timer Measures 4" tall by 3.9" wide by 1" deep. Includes 1 AAA battery. Retractable back lets you stand up timer on flat surface. On / Off Switch to Save Battery Life When Not In Use. It is not necessary to turn it off, but you can extend battery life when stored in a drawer.