Shure BLX24R / SM58-H9PRODUCT DETAILS 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 single channel receiver, BLX2 SM58 handheld transmitter, microphone clip, power supply, 2 AA batteries, and user guide.