Shure BLX24/SM58 Handheld Wireless System (H9 Band - 512-542 MHz)Includes: BLX4 Diversity Receiver and BLX2 Handheld Transmitter with SM58 Microphone. Making the jump to wireless should be liberating, not challenging. Shure BLX Wireless systems combine professional quality sound with simple setup and an intuitive interface, for performance you can trust right out of the box. Precision built and available in a variety of handheld, lavalier, instrument and headset configurations, it's the most accessible way to own