The Shure UR4S is a component of the premium UHF-R wireless system, comprising a single-channel, true diversity rackmount receiver. This kit is designed for professional touring and installed sound applications where reliable, high-fidelity wireless audio is required. The receiver employs sophisticated RF filtering and audio companding technology to deliver clear, transparent sound with a wide dynamic range. Its true diversity operation utilizes two separate antenna inputs and internal circuitry to select the strongest, cleanest RF signal at any moment, significantly reducing the potential for dropouts caused by multipath interference, which is common in live performance environments.

The UR4S features a comprehensive front-panel display and controls, providing detailed information on RF signal strength, audio level, frequency selection, and battery status of the paired transmitter. It offers a selection of audio processing modes tailored for different applications, such as music or speech, allowing engineers to optimize the tone and dynamics for the source. The receiver provides both analog XLR and quarter-inch output connectors, along with a dedicated power supply. It is designed for seamless integration into a larger system, with the ability to link multiple receivers for coordinated frequency management and remote control via optional network interfaces.

As a "kit," this offering typically includes the UR4S receiver, a pair of antennas, antenna cables, a rackmount kit, and the necessary power supply. This all-in-one package provides everything needed to deploy a single channel of professional wireless, making it a versatile and reliable choice for musicians, presenters, theaters, and houses of worship seeking the proven performance and durability of the UHF-R series.