Shure AD221 2-Way Combiner/Splitter streamlines your use of multiple Axient Digital PSM systems at any venue. AD221 combines two incoming signals into one signal or splits an incoming signal into two outgoing signals. Shure AD221 2-Way Combiner/Splitter enables Automatic Transmitter Compensation with ADTQ or ADTD Axient Digital PSM transmitters, which helps defend against passive signal loss.