Compact, Small design allows for mounting in various locations.This under-deck hidden horn is designed for vessels under 12 meters, draws less than 1/2 amp and is easily installed in a standard 2 1/8" cutout. Each unit is completely sealed and comes with a waterproof gasket. All openings are sealed to let sound out but prevent water from coming in.Key FeaturesLoudness; 106-108dBMeets USCG, CE and ABYC standardsPolycarbonate housingSealed with Gortex to prevent water intrusionRecessed mount