Series 84 Forward Facing Diaphragm Style Horn - 110-112 db - Black HousingSmall design allows mounting in various locations. For Vessesls < 12M / 39'Housing - Polycarbonate with optional stainless steel cover. Openings sealed with Gortex(R) to keep water out. Stainless steel screen protects the Gortex(R) membrane from puncturing. Electric - Prewired, polarity protected, 2-wire. Mounting - Recessed mount, easy installation by using a 2-1/4" dia hole saw. Includes mounting hardware and gasket.This series is available only for the US market.WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.