Cnet: Ideally, GPS devices increase safety by allowing drivers to focus on the road instead of fumbling with a map. And though most will admit that it’s safest to not take phone calls when behind the wheel, it’s best to go hands-free if you absolutely must. Why not hit two birds with one stone by grabbing a GPS device that features a built-in Bluetooth speakerphone?
We’ve rounded up our five favorite Bluetooth-enabled portable navigation systems and one in-dash unit. All of these systems will allow you to make and receive calls while keeping your hands safely on the wheel. Stand-out units include the MotoNav TN765t, which also uses its Bluetooth connection with your phone to make Google Local searches and grab fuel prices, and the Pioneer AVIC-U310BT, which utilizes an external microphone and your car’s speakers to achieve the best call quality of the bunch. Detailed comparison…