Whelen Engineering designs and manufactures high quality audio and visual warning equipment for Automotive, Aviation, Mass Notification, and Motorsports industries worldwide. Founded in 1952, Whelen has the largest staff of design engineers in the United States and the biggest field service force in the industry. With two state-of-the-art facilities in Chester, Connecticut and Charlestown, New Hampshire, Whelen products are proudly designed, manufactured, and assembled in the U.S.A. Whelen Automotive designs, manufactures, and assembles Super-LED® lightbars and lightheads, LED beacons, siren control centers, and speakers for Police, Fire, EMS, and Public Works industries worldwide.