Hi @Nels! **When you sound the siren, you can still change alarm modes, and the siren will continue to sound. If you are sounding the siren in Home or Away Mode, switching to Disarmed mode will disarm the system and silence the siren. At this time, there is not a way to set or customize how long the siren sounds for, however, your Alarm siren will automatically stop sounding after 10 minutes if not disarmed or toggled off first. I hope this helps! 
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