The Shure Model UA844+SWB is an antenna distribution system that allows for the expansion of wireless microphone systems by splitting one pair of antennas to multiple receivers. It also amplifies RF signals to compensate for insertion loss that results from splitting signal power to multiple outputs. A single UA844+SWB system can support up to five wireless receivers. A maximum of five UA844+SWB systems may be used in a two-tiered configuration. Model Number: UA844+SWB (replaces discontinued model UA844US). The UA844+SWB/LC option comes with the four push on DC cables and no antenna cables. It is recommended for use with the BLXR, SLX, and QLX-D wireless systems. To connect the receiver antenna ports to the UA844+SWB/LC, use the BNC-BNC antenna cables supplied with each BLXR, SLX, QLX-D wireless systems.