The Yale Sync Powered Security Siren will operate via AC mains or with battery. When the Yale Powered Siren is connected to the mains via the DC input the battery will disable and the battery switch will have no function.
The Yale Sync Powered Security Siren will operate via AC mains or with battery. When the Yale Powered Siren is connected to the mains via the DC input the battery will disable and the battery switch will have no function.