NEWMAR Waterproof Deck Horn w/20/30 Watts, MFG# PA30/20, 20 Watts nominal, 30 Watts peak, 8"W x 4.75"H x 9.2"L; 4" x 2.3" base.8 Ohm. / NMR-PA-30/20 / 20/30 Watt Waterproof Hailer Horn NewMarPA-30/20