This is a countdown timer that you can embed into your own Powerpoint presentation. The timer has five different durations (1:00, 2:00, 3:00, 4:00, and 5:00 minutes). All of them display both the number of minutes and the number of seconds remaining. When the timer reaches 0:00, a red "Time's Up" signal flashes. The timer is pretty easy to create (and manipulate, if you're inclined) in Powerpoint. It's just labor intensive, so I figured I'd do the labor for ya.