100% stainless steel exterior, Type 304 stainless steel diaphragmMaximum amp draw: 3.5 ampsdB(A) rating: 108 at one meterFundamental frequency: 460/-15HzDimensions: 14" L x 3.5" W x 4" HPerfect companion for BoatingElegant and sturdyDurable and features 18.8 stainless steel exterior that shines in the sunMOD CT COMPACT SINGLE TRUMPET