Has a stainless steel diaphragm and mounting bracket in an ABS, triple chrome-plated housing. Loudest Marinco compact electric hornMaximum amp draw: 4 amps, 12 voltdB(A) rating: 123 at one meterFundamental frequency: 290/-15 HzDimensions: 4.25" L x 5" W x 6.5" HINTERNATIONAL SHORTY HORN features a stainless steel diaphragm & mounting bracket, and a triple chrome-plated ABS housing. 12 volt, max. amp draw: 4 amps. 4 1/4"L x 5"W x 6 1/4"H. dB(A) rating: 123one meter.