Koss is a company that designs, manufactures, and sells stereo headphones and related accessories. It offers wireless Bluetooth headphones, wireless Bluetooth speakers, computer headsets, telecommunications headsets, and noise-cancelling headphones. The company sells its products through national retailers, distributors, audio specialty stores, the Internet, direct mail catalogues, regional department store chains, discount department stores, grocery stores, electronics retailers, military exchanges, and prisons under the Koss name, as well as private label.