The BLX14R/MX53 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 MX153 earset microphone, BLX1 bodypack transmitter, BLX4R rack mount receiver, single and dual rackmount kit, two 1/4 wave antennas, zipper bag, power supply, 2 AA batteries, and user guide.