The Coghlan’s Emergency Survival Horn is so loud it can be heard up to a mile away! It operates with the simplicity of a mouth horn and blasts out audible sound up to 120 dB. Featuring a stone and twig guard to protect the rubber membrane, it also includes a break-away lanyard. The blaze orange colour allows it to be easily seen and it also floats. Diameter: 1.75” (4.4 cm), length: 3”(7.6 cm).