The Shure SLX2/SM87C consists of the SLX wireless handheld transmitter fitted with the SM87C microphone capsule. The Shure SLX2 Wireless Handheld Transmitter includes timed backlit LCD display, frequency and power lockout, and "Mute" functionality. The SLX2 transmitter design allows for interchangeable microphone cartridges. The Beta 87C offers an extremely smooth, tailored response for a warm, natural sound. Cardioid polar pattern compensates for the isolation often associated with the use of personal monitors.