Check the listing for details. Shure Wireless Transmitter Model UR1 L3 Bodypack Transmitter. Color: Black, Condition: Used. Listed at 141.99 USD. Shure Wireless Transmitter Model UR1 L3 Bodypack Transmitter The Shure UR1 L3 is a professional UHF‑R bodypack transmitter designed to work with Shure UR4S/UR4D receivers in the 638–698 MHz L3 band, widely used in touring, broadcast, theater, and installed sound. It offers switchable RF power, robust magnesium construction, and long battery life, making it suitable for demanding multi‑channel wireless setups. Key features Frequency band: L3 band covers approximately 638–698 MHz, matching UR4S/UR4D receivers ordered in the same band. RF power: Switchable RF output, typically 10/50 mW (or 10/100 mW depending on region), helping balance range and interference management. Audio quality: Uses Shure’s Audio Reference Companding for cleaner, more transparent sound than older analog companders.