Cruise on your boat with your own personal soundtrack blasting all around you on the Polk Audio MM1 Series 5x7 Inch Coaxial Speakers. These speakers are ultra marine certified for total waterproof design. They're the premium audio upgrade your boat craves with studio quality, total sonic accuracy. Meticulously conceived, designed, and engineered for advanced high quality sound, you'll love hearing every beep, tweet, and twang in your music. These speakers also come with 2 sets of mounting hardware and 2 wiring harnesses so you can hook them up and start blasting your tunes around the lake right away.