Sonova Holding AG designs, develops, manufactures, and distributes hearing systems for adults and children with hearing impairment. It offers hearing instruments, cochlear implants, wireless communication products, and rechargeable hearing aids, as well as professional audiological services. The company provides hearing instruments under the Phonak, Unitron, and Hansaton brand names; cochlear implants under the Advanced Bionics brand name; and professional audiological services under the Connect Hearing brand name. Sonova Holding offers its products through a sales and distribution network, which comprise approximately 50 Sonova-owned wholesale companies and 100 independent distributors; and AudioNova retail network of approximately 3,300 locations in 12 markets. It operates in the Americas, Europe, the Middle East, Africa, and the Asia/Pacific. The company was formerly known as Phonak Holding AG and changed its name to Sonova Holding AG in August 2007. Sonova Holding AG was founded in 1947 and is headquartered in Stäfa, Switzerland.