I believe this would help you. Scroll down to the “Configuring Security alarms” section.
https://support.smartthings.com/hc/en-us/articles/205380154-Smart-Home-Monitor
Also I found this about that siren.
I believe this would help you. Scroll down to the “Configuring Security alarms” section.
https://support.smartthings.com/hc/en-us/articles/205380154-Smart-Home-Monitor
Also I found this about that siren.