The Shure Wireless Handheld Microphone consists of a wireless handheld transmitter fitted with a cardioid microphone capsule. The Shure Wireless Handheld Transmitter includes "Mute" functionality. The transmitter design allows for interchangeable microphone cartridges. The Shure vocal microphone is tuned to accentuate the warmth and clarity of lead and back-up vocals. It is consistently the first choice of performers everywhere.