The Shure UHF-R+ 6 Way Radio Mic System is a professional, wireless technology engineered for the most demanding live event environments. UHF-R+ wireless systems offer unprecedented flexibility and versatility. Using multiple frequency bands, up to 160 compatible systems can be used simultaneously. Individual frequency bands deliver up to 60 compatible systems per band. The UHF-R also includes infra red synchronization that allows you to configure transmitter settings from the receiver.