The Shure ULXD1 is a professional digital bodypack wireless transmitter, a core component of the ULX-D series, engineered to provide exceptional audio quality, RF stability, and intelligent system control for demanding wireless applications. It is designed for use with lavalier or headset microphones, enabling clear, hands-free audio transmission for presenters, performers, and broadcasters in live performance, corporate, worship, and broadcast environments. Operating in license-free frequency bands (such as the 2.4 GHz ISM band in many regions), it utilizes advanced digital transmission to deliver pristine audio with ultra-low latency and robust immunity to RF interference. The transmitter's compact, rugged metal housing ensures durability for touring and daily use.

A key strength of the ULXD1 is its integration into the sophisticated ULX-D ecosystem. It features a backlit LCD screen that displays operating frequency, battery life, audio gain settings, and RF status. The transmitter is powered by a rechargeable Shure SB900 series lithium-ion battery, providing extended runtime and accurate battery life reporting to the receiver and system management software. Advanced features include adjustable audio gain, a tone-key squelch for secure linking, and AES-256 bit encryption for audio security. Through an Ethernet-connected ULXD receiver, the transmitter can be remotely monitored, controlled, and grouped with other system components via Shure's Wireless Workbench software, offering unparalleled control for large-scale productions.