iSimple Factory Radio Interface with CD Changer Control for Select GM Vehicles - Frustration-Free Packaging - Black Control iPod/iPhone like a CD Changer from the factory controls Direct connection provides excellent CD-quality sound Retains click wheel or touchscreen functionality for the iPod/iPhone for ease of use Battery charging for most models of iPod/iPhone The GM iPod Interface kit connects an iPod directly to the factory radio. Track-selection can be controlled from the radio It provides digital-quality sound and charges the iPod while in use