Whelen Engineering designs and manufactures emergency vehicle warning equipment. With the largest engineering staff in the industry, all Whelen products are designed and manufactured in the U.S.A. Whelen products lead the industry, featuring the latest innovations in optics, acoustics, electronics and microprocessor technology. For over fifty years Whelen has been on the forefront of the warning signal industry and with next generation linear LED products such as the Inner-Edge and Liberty lightbar, Whelen shows no signs of slowing down now.