The BLX14UK/P31X-K14 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 BLX4 wireless receiver, BLX1 bodypack transmitter, PGA31 headset microphone, power supply, clothing clip, windscreens, and user guide. FCC CONSUMER ALERT (U.S.)