https://www.majorpolicesupply.com/products/sirens-and-speakers/sirens.html - Major Police Supply offers emergency vehicle sirens of all types so your vehicle will always have the ability to alert drivers of their presence. Our sirens perform well and have a longevity that ensures you won’t have to be concerned about frequent replacement. Major Police Supply 47 N Dell Ave, Kenvil, NJ 07847 Tel No.: 800-666-4472