Mini Compact Single 12 VoltDimensions - 3"L, 3-¼"W, 1-¼"H (7.5 x 8 x 4.5 cm)Max Amp Draw - 3 Amps Rating - 105 db@ 1 MeterStandard Horns 304 Stainless Steel Trumpets, Diaphragm and Mounting Brackets Meets ABYCA-23 for boats up to 12 meters Pre-wired Fits existing hole patterns Much louder than competitive models