The SD-651 is designed to meet the performance criteria designated by UL. Its sensing chambers are sealed against back pressure air flow, dirt, and insects.
System Sensor L-Series selectable output speaker strobes and dual-voltage evacuation speakers can reduce ground faults and enable faster installation with lower current draw and modern aesthetics.
HN-IA240 is a high efficient Power/Booster amplifier provides audio signal amplification for public address and voice alarm system, It is reliable,efficient and light in weight