I'm getting an Ajax alarm installed by HomeSecure & considering including their StreetSiren, which is the equivalent of a siren box.
The system is generally wireless and doesn't use the pre wired cables in the house. However, the StreetSiren can operate by batteries or hardwired via 12v supply.
Most new houses have a cable behind the bricks in the facia of the house... Will this be suitable to power the siren?
Alarm:
https://ajax.systems/
Siren:
https://ajax.systems/products/streetsiren/