The LS1‑OC100E‑1 is used in voice alarm systems and is compliant with emergency standards. The loudspeaker has built‑in protection to ensure that a fire‑damaged loudspeaker does not cause failure of the connected circuit. This ensures system integrity, meaning loudspeakers in other areas can still be used to inform people of the fire. The loudspeaker has
ceramic terminal blocks, a thermal fuse and heat-resistant, high‑temperature wiring.

The loudspeaker is made of high‑impact ABS TSG, self-extinguishing according to class UL 94 V 0 and with the highest flame retardant rating (UL 94 5VA). The loudspeaker has a white and silver finish; the metal grille has a silver finish. All metal parts are zinc plated.

This acoustically innovative loudspeaker accommodates 14 drivers in combination with advanced positioning and filtering.