The V-1036M 15-Watt High-Efficiency Marine Horn, One-Way generates high quality voice paging, emergency alerts and loud ringing for large indoor and outdoor areas such as industrial facilities, warehouses, parking lots, stadiums, schools, parks and others. The V-1036M includes a Omni-Lock™mount for quick and easy installation on multiple surfaces including beams, walls, electrical boxes and other areas. The sturdy construction of the V-1036C includes an O-ring seal.