Sennheiser electronic GmbH & Co. KG (/ˈzɛnhaɪzər/, German pronunciation: [zɛnˈhaɪ̯zɐ]) is a German privately held audio company specializing in the design and production of a wide range of high-fidelity products, including microphones, headphones, and headsets for personal, professional, and business applications. The company’s head office is located in Wedemark, near Hanover, and the company is represented in more than 50 countries worldwide.