Koss Corporation designs, manufactures, and sells stereo headphones and personal listening accessories under the Koss brand and private labels, with approximately 84% of revenue derived from music headphones and the remainder from communications headsets, educational products, and original equipment manufacturer sales. The company distributes its products globally through U.S. and international distributors, audio specialty retailers, national retailers, online marketplaces, and direct-to-consumer channels, serving consumers, schools, correctional facilities, and manufacturers. Koss operates manufacturing facilities in Milwaukee, Wisconsin and uses contract manufacturers in Asia, competing on brand heritage dating to the invention of stereo headphones, product innovation, sound quality, and intellectual property including over 400 trademarks and 170 patents worldwide.