Shure SM83A is a professional quality, omnidirectional miniature, lavalier electret condenser microphone. It features a tailored frequency response designed to provide a natural “stand mike” sound when the microphone is chest-worn. The SM83A is also suited for pickup of acoustic instruments such as guitar, woodwinds, and strings. It has a 12 dB/octave rolloff below 100 Hz to help reduce room noise and other undesirable low-frequency signals.