Terk In-Line amplifier is required for long-wire installations of the Terk XM6 Home Antenna. Features: -For use with Terk XM6 Home Antenna. -Extends the Home Antenna RG-6 Cable an additional 100". -Ensures the strongest possible XM signal to the home receiver. -One In-Line Amp must be placed every 100 feet for optimum performance. -No special cable needed. Uses standard RG-6 cable.