AFI Mini Hidden Boat Horn with BracketAFI brings the mini hidden boat horn with bracket, a durable boat horn that looks good on any vessel. Critical components such as the trumpets, motor cover, diaphragms, assembly and mounting hardware are all made from stainless steel to hold up to harsh marine environments.Features: Type 304 Stainless steel diaphragm; Dimensions 3 1/4"W x 1 3/4"H x 3"L; Maximum amp draw: 3 amps; dB(A) rating: 105 at one meter; Fundamental frequency: 440+/-20; Includes grill mounting bracket; Not designed for installation in exposed areas.