Roadster Portable Hands-Free Car Kit for Motorola V70. An upgraded version of the original Navigator, the Roadster is a compact and cost-effective hands-free solution for your vehicle. Just plug it into the cigarette lighter port of your car and it transforms your mobile phone into a hands-free speakerphone. It rapidly charges the battery and, unlike other portable car kits, includes a cradle that securely holds your phone in place. The Roadster's simple design makes it easy to install and transfer between vehicles.