Helpful if you're one of those people that needs to leave their PC running but doesn't want to wait for their screens to auto-sleep or have to physically turn them off everytime.
Simply launch the executable and your monitors should go to sleep.
A small message will display on screen counting down to when it will do so (and may be cancelled by pressing ESC).
This message can be hidden with a -s or silent launch command like so: SleepMonitors.exe -s
You may also set the delay before the app puts your monitors to sleep using -sleepDelaySeconds 5 as an example to wait 5 seconds.
This helps avoid mouse movements after clicking from potentially waking the sleep. (This timer will happen whether in silent mode or not.)
SleepMonitors.exe -silent -sleepDelaySeconds 8
(Put the monitors to sleep in 8 seconds, without showing a message on screen)