Bogen's HDO100 Microphone handheld public address microphone offers clean and clear sound reproduction with minimal ambient interference. It's moving coil dynamic element provides a smooth, extended response and good linearity. Omnidirectional pickup patterns ensure uniform pickup of sound from all directions with no weakening in frequency. HDO100 Microphone provides a custom tailored balanced response to complement any vocal style and timbre for singing, speech, or instrument sound reproduction. Other characteristics include low sensitivity of -72 dB +/- 3 dB, 500-ohm impedance, internal rubber shock isolation system, a rigid low noise cable mount system, and a lockable silent on/off reed switch.