The Shure Wireless Microphone consists of the SLX2 Transmitter with Beta 87A Supercardioid Microphone. The SLX2 includes timed backlit LCD display, frequency and power lockout, and "Mute" functionality. Its design allows for interchangeable microphone cartridges. With a smooth, tailored response for warm, accurate sound, the Beta 87A vocal microphone leads the field for studio-quality sound in live performance.