Shure SM57 dynamic instrument microphone

Type: Dynamic
Frequency Response: 40 to 15,000 Hz
Polar Pattern: Cardioid
Sensitivity
(at 1,000 Hz Open circuit voltage)
Open circuit voltage: -56.0 dBV/Pa* (1.6 mV)
*(1 Pa = 94 dB SPL)
Impedance Rated impedance is 150 Ω (310 Ω 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
Case Dark gray, enamel-painted, die-cast steel with a polycarbonate grille and a stainless steel screen
Connector Three-pin professional audio connector (male XLR type)
Weight 284 g
Dimensions 157 mm L x 32 mm W