Pontoon Boat Mini Compact Horn with Bracket is constructed of powder coated steel. Includes 304 stainless steel bracket for easy mounting. Recommended for fresh water applications. At 111 decibels and a frequency (Hz) of 37020A, this horn meets US Coast Guard’s COLREGS and ABYC standard A-23 for use on vessels under 12m (39′). 12VDC. NMMA Type Accepted #2601746.