The Chauvet SR-8 Relay Pack features 8 switched power sockets (that correspond to channel 1-8 on the Multi-Function Switch Panel, and one unswitched power socket for constant on item). An unlimited amount of SR-8 relay packs may be run off one multifunction switch panel. Simply connect an EXCB-25 extension cable from the line out on one SR-8 relay pack to the line in on another relay pack. Please note maximum load per relay pack is 15 amps or 1800 watts.