Resonating Horn, 120 Volt AC, 60Hz, 0.75 Amp, 105 Decibels at 10 Feet, Weatherproof, Indoor/Outdoor Rated, Aluminum Housing With Brass Projector and Tapped With 1/2 Inch Conduit Holes, Designed for High Ambient Noise Areas.
Resonating Horn 250VDC - Resonated column of air generates sound. Model 55 produces 105 dBa at 10 feet (115 dBa at 1m). Model 56 produces 106 dBa at 10 feet (116 dBa at 1m). Indoor/outdoor use. Corrosion resistant cast aluminum housing and spun brass projector. Gray enamel paint coating. Weatherproof, water and dust-tight. FM Approved. Model 55 (120VAC), Type 3R is UL Listed and CSA Certified.