The Shure BLX14R/P31-H8E Wireless System operates within the 518-542 MHz frequency band. Its designed for presentations multi-instrumentalists and active performers. The system offers analogue wireless transmission and includes the BLX1 bodypack transmitter BLX4R wireless receiver and the PGA31 headset microphone. The BLX4R receiver comes with a rack mount kit and removable antennas for quick and intuitive operation. This range by Shure prides itself on professional sound that is easy and efficient to setup giving you the freedom to perform with quality.