Headworn Wireless System is part of the BLX wireless systems family. Shure BLX Wireless Systems combine professional-quality sound with simple setup and an intuitive interface for legendary audio performance right out of the box. Precision-built and available in a variety of configurations, it’s the most accessible way to own the stage. Includes BLX4R rack mount receiver, BLX1 bodypack transmitter, SM35 headset microphone, power supply, clothing clip, windscreens, rack mount hardware, and user guide. Frequency: 518-542 MHz