The Shure ULXD4DUK=-Z18 is a professional dual-channel digital wireless receiver operating in the licence-free Z18 band (823–832 MHz). Part of the ULX-D range, it delivers pristine 24-bit / 48 kHz digital audio with excellent dynamic range and rock-solid RF performance for live sound, theatre, broadcast and installed AV systems.Housed in a compact half-rack metal chassis, the ULXD4D supports two ULX-D transmitters simultaneously and features balanced XLR and jack outputs, Ethernet control via Wireless Workbench, clear front-panel metering and optional AES-256 encryption. Reliable, scalable and sonically transparent, it’s a trusted choice for professional wireless applications where space, quality and consistency matter.