Conventional Type Fire Siren Hooter -Fire Alarm Syustem-2 Wire Type. The audio/visual alarm devices are suitable for connection to 2-wire and 4-wire fire detection and alarm systems. It will operate with both addressable and non-addressable fire detection control and indicating equipment. Activation is initiated upon connection of the operating voltage, allowing connection to either a switched supply at the control and indicating equipment, or via an output module. These  range of non-addressable audio/visual alarm devices provide fire detection and alarm system designers with aneconomical product for life safety and property protection.