OnStar Corporation is a subsidiary of General Motors that provides subscription-based communications, in-vehicle security, hands free calling, turn-by-turn navigation, and remote diagnostics systems throughout the United States, Canada, China and Mexico. A similar service is known as ChevyStar in Latin American markets (Except Mexico). In September 2011 the president of OnStar stated that the service had more than six million customers. A new aftermarket interior rear-view mirror with a built-in OnStar module, branded as OnStar FMV, became available to the public on July 24, 2011. It provides some of the features an OEM system has, such as Automatic Crash Response, Stolen Vehicle Tracking, Turn-by-Turn Navigation, and Roadside Assistance.