Transmits XM satellite signal up to 75, Rebroadcasts to one or more repeater antennas which connect to your home kit or audio systems, Works with all Delphi and most other XM satellite radio receivers through home kits/audio systems, 6 1/2 W x 8 1/2 H x 3 1/3 D, Includes repeater transmitter and antenna, AC power adapter and mounting hardware