Deluxe Stainless Steel Dual Trumpet. 12 Volt. Dimensions: 18-1/2"L, 8"W, 5"H (47 x 20.5 x 12.5 cm). Max Amp Draw: 8 Amps. Rating: 122 db@ 1 Meter. Stainless Steel Horns. All Stainless Steel Inside & Out. 304 Stainless Steel inside & 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