Special Features:

Designed to provide supervised audible signal circuit utilizating polarized, parallel-connected, alarm bells, horn, etc; actuation of the module is caused by a high going dc input signal; dual input activation terminals are provided to facilitate programming; contains a yellow led trouble indicatorto indicate open or shorted alarm lines when the system is not in alarm or on battery

Properties:

An automatic electrical, electromechanical, or electronic device which generates and/or controls the energy which actuates electrical alarms such as bells, horns, sirens, buzzers, lights, and which does not in itself contain the actual alarm. If complete with alarm, the device takes the name of the type of alarm, such as alarm (as modified).