The Shure SM58® unidirectional (cardioid) dynamic vocal microphone is designed for professional vocal use in live performance, sound reinforcement, and studio recording. It has a tailored vocal response for a sound which is a world standard for singing or speech. A highly effective, built-in spherical filter minimizes wind and breath "pop" noise. A cardioid pickup pattern isolates the main sound source while minimizing unwanted background noise. 
Rugged construction, a proven shock-mount system, and a steel mesh grille ensure that even with rough handling, the SM58 will perform consistently, outdoors or indoors.
Features:
Frequency response tailored for vocals, with brightened midrange and bass rolloff
Uniform cardioid pickup pattern isolates the main sound source and minimizes background noise
Pneumatic shock-mount system cuts down handling noise
Effective, built-in spherical wind and pop filter
Supplied with break-resistant stand adapter which rotates 180 degrees
Legendary Shure quality, ruggedness and reliability
Cardioid (unidirectional) dynamic
Frequency response: 50 to 15,000 Hz
Replacement cartridge: R59
 
Type
Dynamic (moving coil)
 
Frequency Response
50 to 15,000 Hz
Polar Pattern
Unidirectional (cardioid), rotationally symmetrical about microphone axis, uniform with frequency
 
Sensitivity (at 1,000 Hz Open Circuit Voltage)
-54.5 dBV/Pa (1.85 mV)
1 Pa = 94 dB SPL
 
Impedance
Rated impedance is 150 ohms (300 ohms actual) for connection to microphone inputs rated low impedance
 
Polarity
Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
 
Connector
Three-pin professional audio connector (male XLR type)
 
Case
Dark gray, enamel-painted, die cast metal; matte-finished, silver, spherical steel mesh grille
 
Overall Dimensions
See User Guide
 
Net Weight
298 grams (10.5 oz)