An injection-molded housing under the stainless steel covers protects the steel covers from rusting, leaving it completely rust-free after a 600 hour salt spray test. This horn comes with a 5-YEAR rust-free warranty. Meets ABYC standard A-23, NMMA type accepted 748120 for use on vessels under 39′. 12 volt DC.,WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit P65Warnings.ca.gov