SIRIUS Satellite Radio on board! In conjunction with Pioneer SAT Radio Ready headunits, the SIR-PNR2 offers crisp, digital-quality sound from over 120 channels -- including 65 channels for commercial-free music and more than 50 for sports (NFL, NBA, NHL games and others), news, and a wide array of entertainment programs. SIRIUS Satellite Radio also boasts stable signal transmission to tuners. Three powerful SIRIUS satellites fly directly over the U.S. at high elevation angles, ensuring coast-to-coast coverage. The satellites" clear line of sight keeps drivers tuned to the selected channels without obstruction from buildings or trees. The SIR-PNR2 is a SIRIUS Digital Satellite Tuner for use with Pioneer "SAT Radio Ready Headunits and AV Receivers. Features IP-Bus Input and Output, Single-Pole Sirius Antenna included, and 1-year Warranty.