It works by specifying the action and the time for the countdown. Once it reaches 00:00 the program will perform the specified action.
You can set any amount of time you want, from one second to many days. The current time and date are below, so you can easily calculate how much time has to pass before the program performs the task.
Chronometask lets you add and subtract time by pressing a button, and pause or stop the countdown.
If you are looking for an application with which to schedule tasks for Windows automatically, Chronometask is your solution.