Timers are sometimes set to count down the time for an operation to be completed, and then continue to count up the time that the operation has run over.
Selected color remains on during each programmed counting period.
Set the unit to turn on the red light when the time for the operation has expired. Useful for announcing the status of work stations in manufacturing or providing a count down signal which is visible from all sides. Programming is done with an IR remote keypad. A ten up button is also included. The actual count is often indexed by mechanical means.