Why do some GPS devices have Bluetooth®?

While no global positioning system (GPS) device needs its Bluetooth® functions to operate, the fact that they exist merely represents a convenience to the average user. In cases where people are driving and receiving phone calls, this represents yet another option in hands-free phone conversations. Further, the Bluetooth® GPS receiver can provide a number of other benefits as well. A Bluetooth® connection can aid in receiving and making calls. The fact that most GPS receivers have a touch screen makes the answering of a call very convenient. Most Bluetooth® devices, once the wireless connection is completed to the mobile phone, will display the incoming call on the screen. Answering it is as simple as touching the screen. The conversation is usually held through the navigation device's internal microphone. The speaker in the Bluetooth® GPS, which usually provides driving directions, is used so that the driver can hear the speaker's voice. It may be possible to attach earphones to the ...  more