Premier Wireless Technology.QD AUDIO UHF-R Wireless Microphone Systems master the high pressure and extreme conditions of any large-scale touring or installations environment while delivering uncompromising Shure sound. Rock-solid engineering, the latest technology, and unparalleled RF performance provide sound professionals with all the features and flexibility. UHF-R incorporates automatic frequency selection, transmitter sync and smart menu-driven system functionality for intuitive and fast setup. Up to 200 selectable frequencies across an ultra-wide 60 MHz bandwidth provide superior capability to respond to changing or unpredictable RF conditions. UHF-R Wireless features Audio Reference Companding for crystal-clear sound beyond the limits of conventional wireless technology.