The Federal Signal Model 52 resonating horn is capable of penetrating high ambient noise levels with a 1000 foot range. Being electrically-activated the Model 52 does not require an air compressor for operation. The Model 52 is able to withstand the shocks vibrations dust and atmospheric conditions encountered in off-road use. Rubber gaskets and a power connector make the Model 52 completely watertight. The projector and internal parts are made of zinc-coated steel or stainless steel to resist corrosion; the exterior is sealed with gray enamel paint. The housing is die-cast aluminum. Tied and adhesive-bonded internal wiring helps prevent electrical shorts wire breakage and loose connections. The Model 52 is available in 24VDC. Its 18-32V operating range allows for collage inconsistencies.