Shure QLXD4 Wireless Receiver (H50 Band - 534-598 MHz)With transparent 24 bit audio quality and incredibly efficient RF spectrum usage, the QLXD4 Wireless Receiver combines professional features with streamlined setup and operation. Automatic scanning quickly finds open frequencies, and one touch IR sync quickly deploys them to transmitters. Ethernet networking enables networked channel scanning across multiple receivers and Wireless Workbench software integration for remote control of receiver settings