Mini Compact Single 12 VoltDimensions: 3"L, 3-1/4"W, 1-1/4"H (7.5 x 8 x 4.5 cm)Max Amp Draw: 3 Amps Rating: 105 db@ 1 MeterStandard Horns304 Stainless Steel Trumpets, Diaphragm and Mounting BracketsMeets ABYCA-23 for boats up to 12 meters Pre-wired Fits existing hole patterns Much louder than competitive models