Off - power allowance , less than 1minute

SmartThings’ official features don’t schedule in less than a minute because to be honest you can’t guarantee that in a mesh system. Let alone a mesh system combined with a cloud platform. :wink:

Core can definitely let you enter a shorter timeframe, which may work or may not. Or may work on one day and take longer on the next.

For industrial applications, you would use a siren that had the timer built into the Siren itself, rather than trying to do it with a networked command.

If you’re willing to use core, you can try it and see. It’s going to depend a lot on the specifics of your local network.

There are lots of people in the peer assistance thread who will be glad to help you.