The SPT15A Megaphone is a high-intelligibility, reentrant-type horn loudspeaker designed for both one-way and talk-back communication systems. Its weatherproof, all-metal construction makes it suitable for indoor and outdoor environments, including industrial plants, warehouses, schools, construction sites, transportation terminals, and recreational areas. The speaker offers a 15-watt power output with 25V and 70V operation, providing multiple wattage options for flexible integration. Installation is simplified with a tilt-and-swivel base and screw terminals, and the self-aligning, field-replaceable diaphragm ensures long-term reliability.