Award-winning horn is great for emergency signaling or sending a message.This handheld horn is great onboard for emergency signaling or boat-to-boat hailing and for camping, hunting, hiking or sporting events. This electric horn contains no CFCs, and has no leaking or shelf life issues.Battery operated; requires one 9-Volt battery (sold separately)WeatherproofSolid state electronicsShock resistant constructionContains no CFCsNo hazardous materialsNo leaking or limited shelf lifeMeets U.S. Coast Guard requirements for vessels under 12 meters (39.4 ft.)Sound output of 112dB at one meterDimensions: 6 7/16" x 3 3/8"