This audible 12-inch time timer is used to solve time perception problems at all ages and ability levels and is a perfect size for group or class settings. A graphic clock face gives the child visual understanding of time elapsing. The autism countdown timer is visual and when the colored portion elapses, time is up. There is an optional audible component that you can turn on so that the timer beeps when time is up. It runs on battery operated quartz movement and can be free standing or hung on a wall.