●Has a totally sealed sound unit with type 304 stainless steel cover, diaphragm and mounting bracket ●Maximum amp draw: 3 amps, 12 volt ●dB(A) rating: 106 at one meter ●Fundamental frequency: 440 +/- 20Hz ●Dimensions: 3" L x 3.25" W x 1.75" H ●12-volt electric boat horn; comes with vibration-dampening pad ●Cover, diaphragm, and mounting bracket made of 18/8 stainless steel