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. With PGA31 Headband Microphone, power supply, clothing clip, windshield and user guide. The BLX14 / P31 Wireless Headband Microphone System is part of the BLX® wireless systems.