This is a transition timer that I display on the tv when it is time for my class to transition to a new activity. It is approximately 1 minute long and counts down from 1 min to 30 seconds to 15 seconds and then rings a school bell when time is up. My classes learn quickly to sing along as they get things picked up and set up for the next activity. When the bell rings, the class is quiet and ready for directions. We all enjoy transition time much more with this visual and auditory timer.