On the other hand, if you want the loudest tones possible, an air horn is your only choice. How to Install a Car Horn Most electric car horns are just plug and play.

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SeaSense Air Horn – Jumbo Size (8 oz), 127 dB – Loud 1 Mile Range, Meets EPA & USCG Standards – Great for Boat & Marine Safety, Ideal for Sporting Events Such as Football & Soccer ...