Terk's XM-SP Antenna Input Adapter is designed for XM radio receivers. It allows a single-connection XM antenna to be used with an older XM tuner that requires a dual connection. Simply connect your antenna to the connector on one side, and connect the two leads on the other side into the tuner. All connectors are color-coded for easy installation. Terk offers a 1-year warrranty with this adapter.