content: Cobra is pushing the "My Favorite Brands" functionality in this device whereby you can specify your favorite retailers and the device will attach special icons to those locations on the map as you drive. Over 600 brands are available to choose from. There is an optional traffic receiver for the Cobra NAV ONE 2100, but not included with the device. The receiver costs $99 and the traffic subscription costs $60/year. When driving in traffic the device can calculate two alternate routes around traffic and let you choose which one you prefer. Cobra is also touting the wide range of temperatures the NAVONE 2100 is allowed to operate in. You can use the 2100 in temperatures from -4 to 158 Fahrenheit. Overall this is a fairly good unit but I have got occasional error messages while using it. Once it is shut down and turned back on then it is fine. It will also occasionally give incorrect directions but only not often enough to be a major issue.