Two new XVIVE U3R these are the receivers only no transmitters , $25.00 each, XLR connectors, multiple receivers can be used with one transmitter. for example, one transmitter plugged into the speaker mains or speaker monitor output of a mixing board and then multiple receivers are plugged into each powered main or monitor speaker, or you can send the transmitted signal from one microphone transmitter to multiple receivers that are plugged into several mixers, amps etc.