The UR4D+ receivers provide single and dual-channel options for premium wireless. Technology innovations such as Networked Automatic Frequency Selection and Automatic Transmitter Setup provide advanced control and robust flexibility for a wide range of professional uses. RF distribution ports allow up to 10 receivers to share a single pair of antennas. For use with UHF-R Wireless. UHF-R Wireless features the Shure patented Audio Reference Companding for crystal-clear sound beyond the limits of conventional wireless technology. Various frequencies available, give us a call to find your system with or without antennas and distribution. Also available with new dpa lavalier or headset microphones, call for more details