Shure UA221 Passive Antenna Splitter / Combiner for Shure Wireless ReceiversThe Shure UA221 Antenna Splitter Combiner Kit includes two adapters that can be used as one input, two output or two input, one output passive antenna splitter combiners for UC4, SLX4, ULXS4, ULXP4, U4S, U4D, UR4S and UR4D receivers. The UA221 Kit lets you split an incoming signal into two outgoing signals or combine two incoming signals into one signal. Each kit includes two UA221 Splitter Combiners, four coaxial cables, and attaching hardware. The