Universal 20' Antenna Extension Cable 20ft 6M SMB for Sirius XM Radio Garmin GPS Receivers Extend your XM or Sirius satellite radio antenna an additional 20ft Perfect for bringing your radio signals just that extra bit further Can be used in your car or vehicle to extend you XM head unit add-on antenna Can be used to extend any compatible GPS, 3G, or 4G antenna Fully compatible with Verizon 3G/ 4G network extender scs-2u01 , scs-26uc4 and scs-2u3100, Magellan colortrak, 410, 750Nav, and select trimble GPS models.