Seachoice Hidden Horn. Made for a well-equipped boat! Meats ABYC and NMMA specifications. Includes stainless steel cover and 2 electrical connectors (packard and 2-T disconnect). 12V DC. Size: 3.1" h. x 5.6" w. x 3.6" d. Fastener on center width 2.1". Order Today! Seachoice Hidden Horn