Delphi Premium Sound System for SkyFi3, Roady XT, MyFi, and Audiovox Xpress Digital Signal Processing (DSP) for optimum equalization Integrated XM antenna (works right out of the box in most locations) Compatible with Delphi Receivers(SKYFi3 Roady XT and MyFi) Compatible with Audiovox (Xpress R Xpress RC), Onyx, XM Mirg