Resonating Horn, 120VAC - Available in 24VAC and 120VAC. Produces 105 dBa at 10 feet (115 dBa at 1m). Indoor/outdoor use. Corrosion resistant cast aluminum housing and spun brass projector. Weatherproof, water- and dust-tight. Swivel bracket included. Type 3R enclosure. Model 55 (120VAC) is UL Listed and CSA Certified.