Includes two frequency matched antennas, two premier Shure UR2 transmitters and Beta 87A head for the perfect solution to professional live performances. The H4 band spans 60 MHz of bandwidth (TV channels 22–31 in legacy systems), providing up to 2,400 selectable frequencies. The "+" denotes the upgraded hardware version of the receiver:\

• Standard UR4D: Required an external antenna splitter/distribution amplifier if you wanted to chain multiple dual-receivers together.\
• UR4D+: Features integrated RF distribution ports on the back panel. This allows up to 10 dual-channel units (20 channels total) to be daisy-chained directly together, sharing a single pair of antennas without needing external splitters. Features\
• Dual-Channel Architecture: Houses two independent, microprocessor-controlled diversity receivers in a single 1RU space-saving rack chassis.\
• Audio Reference Companding:Shure's patented variable companding ratio yields ultra-clear, transparent audio that mimics a high-end wired microphone.\
• Track Tuning Filtering: Advanced filtering shifts the RF filter alongside the selected frequency, delivering a highly stable signal even in crowded RF environments.\
• Network & Software Integration:Features built-in USB and Ethernet ports to connect directly to a computer. This unlocks the ability to use Shure Wireless Workbench (WWB) software for complex frequency coordination, live RF environment scanning, and multi-receiver remote monitoring.\
• Infrared Sync: Simplifies setup by instantly sending frequency, group, and custom settings from the receiver to compatible H4 transmitters (like the UR1 bodypack or UR2 handheld) via an IR beam.