Stainless Steel Mini Compact Twin. 12 Volt. Dimensions: 3"L, 8"W, 1-3/4"H (7.5 x 20.5 x 4.5 cm). Max Amp Draw:6 Amps. Rating: 112 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