GTM traffic cables are optional and not required for proper operation of the navigation system. The BMW Portable Navigation Pro system is the quintessential travel companion that combines navigation, touring information, and digital entertainment features, making even the shortest of trips easier and more enjoyable. This device includes Bluetooth hands-free functionality and is preloaded with detailed maps for United States, Canada and Puerto Rico. It features a 4.3 inch touch screen with 2D and 3D map display modes. Additional features include 3D buildings and Lane Guidance to better navigate exits. Features include Bluetooth hands-free ability, voice activation, ecoRoute, lane assist and free lifetime map updates. Designed with BMW specific features such as Center directory and vehicle selector. Battery life of up to five hours when used outside your vehicle.