Koss 

Koss Corporation, together with its subsidiaries, designs, manufactures, and sells stereo headphones and related accessories in the United States, the Czech Republic, Sweden, Canada, the Russian Federation, Japan, Malaysia, and internationally. It offers high-fidelity headphones, wireless Bluetooth headphones, wireless Bluetooth speakers, computer headsets, telecommunications headsets, active noise canceling headphones, and compact disc recordings under the Koss Classics label. The company sells its products through distributors, international distributors, audio specialty stores, the internet, national retailers, grocery stores, electronics retailers, military exchanges, and prisons under the Koss name, as well as private label. It also sells its products to distributors for resale to school systems, as well as directly to other manufacturers. The company also exports its products. Koss Corporation was founded in 1953 and is headquartered in Milwaukee, Wisconsin.