Standard Horizon leads the world's marine communication markets. Marine products require high reliability and functionality because ships must be operated safely, especially under severe weather conditions. Standard Horizon is the leader in communication equipment covering the HF to VHF frequencies for all kinds of boating. You can trust Standard Horizon to continue to provide highly reliable products with the latest technology.
![Standard Horizon 4.5" Round Hailer/PA Horn - White [220SW] - Mealey Marine](http://mealeymarine.com/cdn/shop/products/10391XL.jpg?format=webp&v=1613364520&width=1000)
