Siren (Fallout 4)

A siren is a settlement object in Fallout 4.

Characteristics
When built and properly powered, a siren can provide a valuable alarm to alert settlers in a settlement. The siren sits dormant until activated. When activated, either by the Sole Survivor or a settler, the siren lets out a loud wail, alerting settlers to danger, and telling them to stop what they're doing and draw their weapons.