The name of a wireless hands-free communication and entertainment system is Sync. For $395 you get possibility to connect various devices such mobile phones, portable media players etc to your car audio system. Additionally Sync includes integrated diagnostics system, which gives vehicle health report to the driver, and, of course, navigation system.
In my opinion, it’s really good and useful. The number of mobiles devices grows very fast and people want to have possibility to connect them to their cars. This is a wise decision of Microsoft to expand its zone of dominance.