The HLE-1T is a explosion-proof compression driver engineered for high-efficiency voice and electronic signal communication in hazardous areas.The driver is protected within a rugged die-cast aluminum housing equipped with 1/2" conduit access and an adjustable mounting bracket.Optional projector horns are available in two styles to meet dispersion requirements. Model HLE/MLE-30 is a high-quality, polycarbonate projector that creates a 120 #176; x 60 #176; pattern for wide area coverage. Model HLE/MLE-32 is a spun aluminum bell providing a 95 #176; circular distribution emphasis.*ONLY The HLE/MLE-30 and the HLE/MLE-32 Horns are UL Listed for use with the HLE or MLE Line of Explosion Proof Drivers.