Shure UHF-R™ Wireless Microphone Systems master the high pressure and extreme conditions of any large-scale touring or installation environment while delivering uncompromising Shure sound. Rock-solid engineering, the latest technology, and unparalled RF performance provide sound professionals with all the features and flexibility they need to tightly control up to 108 systems for the most elaborate productions. The UR1 transmitter is Shure's most compact bodypack, constructed of lightweight and rugged magnesium to be exceptionally unobtrusive and abuse-resistant.