The Marinco Mini Hidden Horn is very compact and designed for below-deck or hideaway locations. Ideal horn for boats with limited space. Type 304 stainless steel diaphragm. Not designed for installation in exposed areas. dB(A) rating: 105 at one meter. Maximum amp draw: 3 amps. Fundamental frequency: 440±20Hz. 3"L x 3.25"W x 1.75"H.