12V International Shorty HornThe International Shorty Horn has a stainless steel diaphragm and mounting bracket in an ABS, triple chrome-plated housing.Features:. Dimensions: 4.25" L x 5" W x 6.5" H. Maximum amp draw: 4.5 Amps, 12 Volt. Fundamental frequency: 310 +/- 20 Hz. Loudest Marinco compact electric horn. dB(A) rating: 123 at one meter