The Shure BLX24R/SM58 Wireless Rack-mount Vocal System combines professional-quality sound with simple setup and up to 14 hours battery life for legendary audio performance right out of the box. The system includes BLX4R half-rack single-channel receiver, legendary SM58 handheld transmitter, microphone clip, power supply, 2 AA batteries, rackmount kit, 2 1/4 wave antennas, and user guide.

Get the show going with no wires attached. Professional Shure sound for every band and any vocal need.
With a range of up to 300 feet (100m), you can take the show into the crowd without interruption.
BLX will have you up and running in record time with one-touch scan and selection.
Because BLX transmitters get up to 14 hours of power from a single pair of AA batteries, the show can go on and on (and on).
An impressive variety of Shure microphones are available in BLX systems, so you can find what works for you.