Hi @Earther. The Ring Spotlight Cam does not have a siren that automatically goes off. As with our other Security Cameras that have sirens, the siren must be manually activated by pressing a button in the app and confirming you wish to sound the siren. This would allow you to deter an unwanted visitor. Again, the siren does not automatically go off with motion detection.
If you have a Ring Alarm Security System set up at your home, you can use the Linked Devices feature to link your Security Camera with the Alarm system. This allows you to choose for the siren on the Camera to go off when the Ring Alarm’s siren has been triggered.