Russound A-H4 4 Room Single Source Surface Mount Hub Works With Russound A-K4, A-K3, A-KP2, A-KP Amplified Keypads Provides source status indication on your keypads Mounts unobtrusively near your audio equipment, on a shelf or in a rack or cabinet Includes a source loop output and IR emitter jacks for four source components Links to other hubs for more zones