Low current, high decibel, AC vibrating horn for heavy duty use and is UL listed to NEMA 4X enclosure requirements. The die cast weatherproof box has a durable, corrosion resistant, electrostatic heat flowed powder epoxy gray finish. May be used for indoor and outdoor applications. 872 PO Plastic Projector AdaptaHorn Accessory. Plastic projector snaps onto any AdaptaHorn. Available as separate item.