The EasyView Digital Sand Timer from Educational Insights combines the familiar shape of a sand timer with digital technology. Unlike traditional sand timers, you can customize your countdown by adjusting the duration of the timer (up to 99 minutes). Best of all, you can hear when the time is up! The digital display shows elapsed time while simulating falling grains of sand. It also features an easy-to-use stopwatch, 12/24 hour clock mode, and alarm clock. Perfect for games and activities! Measures approx. 4.5." Requires one AAA battery (not included).