Dimensions: 3"L, 3-¼"W, 1-¾"H (7.5 x 8 x 4.5 cm)Max Amp Draw: 3 Amps Rating: 105 db @ 1 MeterStainless Steel HornsAll Stainless Steel Inside and Out. 304 Stainless Steel inside and out including sealed sound unit. No rust Guaranteed for 5 years. All meet ABYC A-23 for boats up to 12 meters. Pre-wired Fits existing hole patterns.