Shure's legendary SM58 dynamic vocal microphone is tuned to accentuate the warmth and clarity of lead and back-up vocals and it's consistently the first choice of performers around the globe. The SM58 also features a highly effective built-in, spherical filter, which minimizes wind and breath "pop" noise, while its cardioid pickup pattern helps to isolate the main sound source, while minimizing unwanted background noise. Outdoors or indoors, singing or speech the SM58 is the overwhelming choice of professionals. This is the SM58S, which adds an on/off switch.