Autonomous siren and beacon BS-413 & BATTERY 12V OLYMPIA ELECTRONICS

Autonomous daroseirina BS-413 Battery D-989 12V OLYMPIA ELECTRONICS. 

The BS-413 alarm siren is a durable construction that is used in 

combination with conventional wiring alarm panels such as the BS-468 panel. 

It has a red beacon blinks when the siren is activated and a piezoelectric 

membrane, which produces sound intensity 115dB at 1 meter.