Constructed of durable chrome plated brass. Display pack includes horn, compressor, air tubing, and mounting hardware. Meets the US Coast Guard's COLREGS, US Inland Navigation Rules, Annex III Regulations, and ABYC standard A-23 for boats up to 20 meters (66?). 12VDC. Maximum: 20A. NMMA Type Accepted. Style Compact Single Finish Powder Coat Size 9-5/8" Rating 124 db Volts 12