Bluetooth wireless technology is a revolutionary technology that allows a compatible headunit to communicate with most Bluetooth wireless technology enabled cellular phones, treating the mobile phone as a source device. After setting up an individual user ID, Bluetooth wireless technology can automatically communicate between the phone and headunit whenever the two devices are within range of each other. This lets you make/accept calls (including call waiting), talk, and hang up via the audio system, without touching the phone at all — even when, for example, the headset is in your pocket, bag, or briefcase. Bluetooth wireless technology also allows you to place and receive calls through the headunit using voice-recognition dialing*. The included microphone eliminates the need for an additional hands-free kit installation. The result is the optimum in both convenience and driving safety.