Milwaukee Twins Universal Custom Round Horn Milwaukee Twins universal 4 diameter horn with 110 decibel it is loud enough to get the attention you need. 12V horn features a universal mounting bracket and a chrome-plated, injection-molded cover which snaps on and off easily. Features: Injection molded chrome removable cover 4 diameter 12 Volt 2-wire connection Universal mount bracket Spade terminal connectors It may be used for a variety of custom applications